Washing machine

Abstract

To provide a washing machine capable of suppressing remaining of a liquid agent in a pipe part and discharge part.SOLUTION: A washing machine includes: a washing tub; a water supply device; a liquid agent tank for storing a liquid agent which is supplied to the washing tub; a pipe part in which water is supplied from the water supply device, and in which water flowing into the washing tub flows; and a liquid agent input device which has a discharge part for discharging the liquid agent stored in the liquid agent tank to an inside flow passage of the pipe part. The pipe part has a protrusion part protruding upward from an inner bottom surface. The protrusion part has a rising part which rises to the upstream side.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a washing machine.

Background Art

[0002] For example, Patent Document 1 discloses a washing machine including a washing tub, a water supply valve, a liquid agent tank containing a liquid agent, a flow path member for guiding water and the liquid agent to the washing tub, a pipe portion for supplying water from the water supply valve to the flow path member, and a liquid agent pump for discharging the liquid agent into the pipe portion.

[0003] In the washing machine described in Patent Document 1, the pipe portion is inclined downward. The liquid agent discharged into the pipe portion flows through the pipe portion according to the inclination.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the washing machine described in Patent Document 1, there is still room for improvement in terms of sticking of the liquid agent in the pipe portion and the discharge portion.

[0006] Therefore, an object of the present disclosure is to solve the above problems and to suppress the remaining of the liquid agent in the pipe portion and the discharge portion.

Means for Solving the Problems

[0007] A washing machine according to one aspect of the present disclosure includes a washing tub, a water supply device, a chemical tank for storing chemicals to be supplied to the washing tub, a pipe portion through which water supplied from the water supply device and flowing into the washing tub flows, and a chemical injection device having a discharge portion for discharging the chemicals stored in the chemical tank into the internal flow path of the pipe portion. The pipe portion has a protrusion protruding upward from the inner bottom surface below the discharge portion, and the protrusion has a rising portion that rises on the upstream side.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to provide a washing machine that suppresses the residue of chemicals in the pipe portion and the discharge portion.

Brief Description of the Drawings

[0009]

Figure 1A

Figure 1B

Figure 2A

Figure 2B

Figure 2C

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 6

Figure 7A

Figure 7B

Figure 8

Figure 9A

Figure 9B

Figure 9C

Figure 10A

Figure 10B

Figure 11A

Figure 11B

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0010] (Embodiment 1) The washing machine according to Embodiment 1 of the present disclosure will be described.

[0011] [Overall Configuration] FIG. 1A is a perspective view of the washing machine 1 according to Embodiment 1 of the present disclosure. FIG. 1B is a schematic cross-sectional view showing the washing machine 1 according to Embodiment 1 of the present disclosure. As shown in FIG. 1A, the washing machine 1 is a vertical washing machine, but is not limited thereto. The washing machine 1 may be a drum-type washing machine or a washing and drying machine.

[0012] In the following drawings, the horizontal directions orthogonal to each other are defined as the X direction / Y direction, and the vertical direction orthogonal to both the X direction and the Y direction is defined as the Z direction. The horizontal direction and the vertical direction are respectively the horizontal direction and the vertical direction in a state where the washing machine 1 is used in a self-standing manner. Note that the X direction may be referred to as the width direction, and the Y direction may be referred to as the front-rear direction.

[0013] As shown in FIGS. 1A and 1B, the washing machine 1 includes a housing 2, an outer tub 3 (FIG. 1B), a washing tub 4, a drive unit 5 (FIG. 1B), a chemical supply unit 6, a water supply device 9 (FIG. 1B), a drain valve 11 (FIG. 1B), and a control unit 12 (FIG. 1B).

[0014] [Housing] As shown in FIG. 1B, the housing 2 is a member that forms the exterior of the washing machine 1. The housing 2 is divided into an upper part 2A and a lower part 2B below the upper part 2A. An opening 20 and a lid 21 that can be opened and closed to cover the opening 20 are provided on the upper surface of the upper part 2A. The upper part 2A houses the chemical supply unit 6, the water supply device 9, and the control unit 12. The lower part 2B houses the outer tub 3, the washing tub 4, the drive unit 5, and the drain valve 11.

[0015] <outer tub> The outer tub 3 is provided inside the lower part 2B of the housing 2 and is a substantially cylindrical member having a function of storing washing water. The outer tub 3 may be referred to as a water tank. The central axis V0 of the outer tub 3 extends along the Z direction and passes through the center of the bottom of the outer tub 3. The outer tub 3 has an opening 30 at a position facing the opening 20 of the housing 2.

[0016] <washing tub> The washing tub 4 is provided rotatably around the central axis V0 inside the outer tub 3 and is a substantially cylindrical member that houses laundry such as clothes. The washing tub 4 may be referred to as an inner tub, a storage tub, or a drum. A large number of through holes 40 are formed in the washing tub 4. The through holes 40 communicate the washing tub 4 and the outer tub 3 and enable the movement of washing water between the washing tub 4 and the outer tub 3. The washing tub 4 has an opening 41 at a position facing the opening 20 of the housing 2 and the opening 30 of the outer tub 3. When the user of the washing machine 1 opens the lid 21, the user can put laundry into the washing tub 4 through the openings 20, 30, and 41.

[0017] <drive unit> The drive unit 5 is a member that rotationally drives the washing tub 4 around the central axis V0. The drive unit 5 has, for example, a motor that rotates the washing tub 4.

[0018] <chemical supply unit> The chemical supply unit 6 is a device that automatically supplies a single dose of chemical from a tank that stores multiple doses of chemical to the washing tub 4. The single dose of chemical is, for example, an appropriate amount and type of chemical determined by the control unit 12 according to the content of the operation course and the amount of laundry.

[0019] The liquid supply unit 6 is arranged on the back side with respect to the central axis V0 in the Y direction and is arranged so as to overlap a part of the opening 41 of the washing tub 4.

[0020] <Water supply device> The water supply device 9 is a device that is connected to a water source such as a water supply and supplies water to the washing tub 4. Specifically, the water supply device 9 supplies water to the washing tub 4 via the liquid supply unit 6.

[0021] <Drain valve> The drain valve 11 is a valve configured to be openable and closable. When closed, it stores water in the outer tub 3, and when opened, it drains the water stored in the outer tub 3. The drain valve 11 is provided at the bottom of the lower part 2B.

[0022] <Control unit> The control unit 12 is a controller that controls the washing machine 1. The control unit 12 includes a general-purpose processor such as a CPU or MPU that realizes a predetermined function by executing a program. The control unit 12 realizes various controls in the washing machine 1 by calling and executing a program stored in a memory (not shown). The control unit 12 is not limited to one that realizes a predetermined function by the cooperation of hardware and software, and may be a dedicated hardware circuit designed to realize a predetermined function.

[0023] Specifically, the control unit 12 controls the drive unit 5, the liquid supply unit 6, the water supply device 9, and the drain valve 11.

[0024] FIG. 2A and FIG. 2B are perspective views of the liquid supply unit 6 and the water supply device 9. FIG. 2C is a schematic diagram of the case 61, the liquid tank 62, the liquid pump 63, the mixing pipe 64, and the flow path member 60. FIG. 3 is an exploded view of the case 61, the flow path member 60, and the water supply pipe 92.

[0025] As shown in FIGS. 2A and 2B, the liquid supply unit 6 includes a case 61, a plurality of liquid tanks 62 (FIG. 2A), a plurality of liquid pumps 63, a mixing pipe 64 (FIG. 2B), and a flow path member 60.

[0026] As shown in FIG. 2A, the case 61 is a member that houses a plurality of liquid agent tanks 62. In the first embodiment, the case 61 houses the three liquid agent tanks 62 arranged in the X direction.

[0027] As shown in FIG. 2C, the case 61 has a support plate 62B that forms the bottom surface. In the first embodiment, the liquid agent tank 62 is supported by the support plate 62B from below.

[0028] Below the support plate 62B, that is, below the case 61, a flow path member 60 is provided. The flow path member 60 is connected to the lower part of the case 61. The flow path member 60 is a member that forms a flow path for guiding the liquid toward the washing tub 4.

[0029] Each of the plurality of liquid agent tanks 62 is a container that stores the liquid agent to be supplied to the washing tub 4 in a plurality of batches during the operation course. Each liquid agent tank 62 may store different types of liquid agents or the same type of liquid agent.

[0030] So that the user can easily clean the inside or replenish the liquid agent, each liquid agent tank 62 is removable with respect to the liquid agent pump 63, and the removed liquid agent tank 62 can be taken out of the case 61.

[0031] As shown in FIG. 2B, the wall portion on the +Y side of the case 61 is defined as the rear wall 61A. The rear wall 61A of the case 61 is a side wall of the case 61 that faces the back surface of the housing 2 (FIG. 1A). A plurality of liquid agent pumps 63 and a mixing pipe 64 are provided on the rear side (+Y side) of the rear wall 61A of the case 61. That is, the plurality of liquid agent pumps 63 and the mixing pipe 64 are provided outside the case 61.

[0032] The liquid agent pump 63 is a device that sucks out a predetermined amount of liquid agent from the liquid agent tank 62 and discharges it into the mixing pipe 64. The liquid agent pump 63 is connected to the liquid agent tank 62 and the mixing pipe 64. As shown in FIG. 2C, each of the liquid agent pumps 63 is connected to one liquid agent tank 62 from the Y direction through an opening 68 penetrating the rear wall 61A of the case 61. The liquid agent pump 63 is disposed directly above the mixing pipe 64 and is connected to the mixing pipe 64 from above. Therefore, the liquid agent pump 63 sucks out the liquid agent in the Y direction and discharges it downward.

[0033] In this specification, "connected" includes both the case of direct connection and the case of connection through other members or spaces.

[0034] Each of the liquid agent pumps 63 has a connection part 71 and a discharge part 72. The connection part 71 is a tubular member connected to the liquid agent tank 62 and sucking out the liquid agent from the liquid agent tank 62. The connection part 71 is connected to the pump receiving part 62A of the liquid agent tank 62. The discharge part 72 is a tubular member connected to the mixing pipe 64 and discharging the liquid agent flowing in through the connection part 71 into the mixing pipe 64. The discharge part 72 forms a discharge port 72A at its tip.

[0035] The support plate 62B supporting the liquid agent tank 62 has an opening 62C at a position facing each connection part 71. The opening 62C vertically communicates the case 61 and the flow path member 60.

[0036] Returning to FIG. 2B, the plurality of liquid agent pumps 63 are arranged at intervals in the X direction. In Embodiment 1, the plurality of liquid agent pumps 63 have a common structure.

[0037] The mixing pipe 64 is a tubular member that connects between the water supply device 9 and the flow path member 60 and supplies the water supplied from the water supply device 9 to the flow path member 60. The liquid agent pump 63 is further connected to the mixing pipe 64. The mixing pipe 64 mixes the liquid agent discharged from the liquid agent pump 63 with the water supplied from the water supply device 9 and supplies it to the flow path member 60.

[0038] The mixing pipe 64 defines an internal flow path R0 through which water flows inside. The water supplied from the water supply device 9 is supplied to the flow path member 60 through the internal flow path R0. The liquid agent discharged from the liquid agent pump 63 is carried by the flow of water in the internal flow path R0 and is supplied to the flow path member 60 through the internal flow path R0.

[0039] In this specification, when a tubular member is connected to another member, it means that the internal flow path of the tubular member communicates with the inside of the other member.

[0040] As shown in FIG. 3, the flow path member 60 forms a first guide flow path R11 and an opening 66 that communicates with the washing tub 4. The first guide flow path R11 is a flow path that guides the liquid agent and water that have flowed into the flow path member 60 to the washing tub 4 through the opening 66. The inner bottom surface 60B of the flow path member 60 in the first guide flow path R11 is inclined downward toward the opening 66. The opening 66 is located above the opening 41 of the washing tub 4. The liquid agent and water that have flowed into the first guide flow path R11 flow along the inclination toward the opening 66 and fall into the washing tub 4 through the opening 66.

[0041] The first guide flow path R11 is defined by a plurality of wall portions 67 that project upward from the inner bottom surface 60B of the flow path member 60.

[0042] The mixing pipe 64 supplies the water and the liquid agent flowing through the internal flow path R0 to the first guide flow path R11 of the flow path member 60. In other words, the internal flow path R0 of the mixing pipe 64 communicates with the first guide flow path R11.

[0043] Separate from the first guide flow path R11, the flow path member 60 forms a second guide flow path R12. The second guide flow path R12 is a flow path that guides the water that has flowed into the flow path member 60 from the branch flow path of the mixing pipe 64 described later, passes below the liquid agent tank 62, and guides it to the washing tub 4 through the opening 66. Specifically, the second guide flow path R12 passes below the connection portion 71 (FIG. 2C) of the liquid agent pump 63.

[0044] As shown in FIG. 2C, when the liquid agent tank 62 is removed (see the dashed line), the liquid agent adhering to the connection portion 71 of the liquid agent pump 63 drips toward the inner bottom surface 60C of the flow path member 60 in the second guide flow path R12 through the opening 62C of the support plate 62B. The dripping liquid agent B1 can be washed away by the water flowing through the second guide flow path R12.

[0045] As shown in FIG. 3, the inner bottom surface 60C of the flow path member 60 in the second guide flow path R12 inclines downward in the +X direction below the plurality of liquid agent tanks 62. Therefore, the water flowing into the second guide flow path R12 reaches the opening 66 after passing below the plurality of liquid agent tanks 62.

[0046] As shown in FIG. 2C, the inner bottom surface 60C in the second guide flow path R12 inclines downward in the +X direction and also inclines downward in the direction away from the rear wall 60A (-Y direction). The rear wall 60A is the wall portion on the +Y side of the flow path member 60 and is located below the rear wall 61A of the case 61. Due to such an inclination, the water flowing into the second guide flow path R12 flows at a position away from the rear wall 60A. Also, the dripping liquid agent B1 gathers at a position away from the rear wall 60A. Therefore, it is possible to suppress the water and the liquid agent from flowing into the inside of the case 61 through the opening 62C of the support plate 62B.

[0047] Returning to FIG. 2B, the water supply device 9 is arranged on the back side (+Y side) of the case 61. The water supply device 9 is arranged at the +X side end of the rear wall 61A of the case 61.

[0048] The water supply device 9 includes a water supply valve 91 and a water supply pipe 92.

[0049] The water supply valve 91 is a valve connected to a water supply. In Embodiment 1, the water supply valve 91 is a member having a plurality of solenoid valves connected to the water supply. By switching the opening and closing states of the respective solenoid valves, the flow path in the water supply pipe 92 can be switched.

[0050] The water supply pipe 92 is a tubular member connected to the water supply valve 91 and having a plurality of flow paths for supplying water from the water supply valve 91 to the flow path member 60 via the mixing pipe 64. Among the plurality of flow paths, the water supply pipe 92 has a water supply flow path L0 inside that connects the water supply valve 91 and the mixing pipe 64 and supplies water to the mixing pipe 64. The water supply flow path L0 communicates with the internal flow path R0 of the mixing pipe 64. The water supply pipe 92 and the mixing pipe 64 may be collectively referred to as a pipe portion.

[0051] With reference to FIG. 4, the configuration of the mixing pipe 64 will be described in more detail. FIG. 4 is a schematic plan view of the liquid supply unit 6 and the water supply device 9. In FIG. 4, the lid covering the upper part of the case 61 and the support plate 62B are omitted, and the members are schematically illustrated so that the connection relationship between the members can be understood.

[0052] As shown in FIG. 4, the mixing pipe 64 has an upstream pipe 87, a downstream pipe 88, and a bent portion 82.

[0053] The upstream pipe 87 is a tubular member connected to the water supply pipe 92 and extending in a direction including the -X component from upstream to downstream. The upstream pipe 87 is connected to the water supply pipe 92 via the inflow pipe 87S. In Embodiment 1, the upstream pipe 87 extends in the -X direction along the rear wall 61A of the case 61 in a plan view downstream of the inflow pipe 87S.

[0054] The downstream pipe 88 is a tubular member connected to the rear wall 60A of the flow path member 60 and extending in a direction including the +X component. The downstream pipe 88 is connected to the rear wall 60A of the flow path member 60 via the outflow pipe 88S. In Embodiment 1, the downstream pipe 88 extends in the +X direction along the rear wall 60A (i.e., the rear wall 61A of the case 61) of the flow path member 60 in a plan view upstream of the outflow pipe 88S. That is, the upstream pipe 87 and the downstream pipe 88 extend parallel to each other and in opposite directions. On the other hand, the inflow pipe 87S and the outflow pipe 88S extend in a direction different from the X direction and extend in the Y direction toward the rear wall 60A.

[0055] The bent portion 82 is a tubular member that connects the upstream pipe 87 and the downstream pipe 88 and bends between the upstream pipe 87 and the downstream pipe 88. Specifically, the bent portion 82 bends along the XY plane. Therefore, the mixing pipe 64 has a shape that is folded back 180 degrees in plan view, and the upstream pipe 87 and the downstream pipe 88 extend side by side in the Y direction in plan view.

[0056] In plan view, the downstream pipe 88 is disposed closer to the rear wall 61A of the case 61 than the upstream pipe 87. In other words, the upstream pipe 87 is farther from the rear wall 61A than the downstream pipe 88. Since the water supply device 9 protrudes in the +Y direction from the rear wall 61A, even if the upstream pipe 87 connected to the water supply device 9 is separated from the rear wall 61A, it is easy to connect the mixing pipe 64 to the rear wall 60A of the flow path member 60. While ensuring a stable connection between the upstream pipe 87 and the water supply pipe 92, a stable connection between the downstream pipe 88 and the flow path member 60 can be ensured.

[0057] The upstream pipe 87 has an internal flow path R1 through which liquid flows inside. The downstream pipe 88 has an internal flow path R2 through which liquid flows inside. The internal flow path R1 and the internal flow path R2 communicate with each other through the bent portion 82.

[0058] The discharge portion 72 of the liquid agent pump 63 is connected to the downstream pipe 88 while being arranged to overlap both the upstream pipe 87 and the downstream pipe 88. Therefore, the discharge port 72A communicates with the internal flow path R2, and the liquid agent discharged from the discharge portion 72 flows into the internal flow path R2. On the other hand, the discharge portion 72 is blocked from the upstream pipe 87 (see the hatched portion). Therefore, the liquid agent discharged from the discharge portion 72 flows into the internal flow path R2 instead of the internal flow path R1.

[0059] From the above, the internal flow path R1 is a flow path for flowing water, and the internal flow path R2 is a flow path for flowing water and liquid agent.

[0060] In the downstream pipe 88, the discharge portion 72 of the liquid agent pump 63 provided at the most upstream side is connected to the first position P1 in the middle of the downstream pipe 88 and discharges the liquid agent toward the first position P1. The other discharge portions 72 are connected to the downstream pipe 88 downstream of the first position P1 at intervals in the X direction.

[0061] The inflow pipe 87S extending from the end of the upstream pipe 87 has a connection port 73 connected to the water supply pipe 92. The outflow pipe 88S extending from the end of the downstream pipe 88 has a connection port 74 connected to the rear wall 60A of the flow path member 60 downstream of the plurality of discharge portions 72 (i.e., downstream of the first position P1). The connection port 73 communicates with the water supply flow path L0 of the water supply pipe 92, and the connection port 74 communicates with the first guide flow path R11 of the flow path member 60.

[0062] Considering the flow of water in the internal flow path R0, the connection port 73 is an inlet through which water flows into the internal flow path R0, and the connection port 74 is an outlet through which water flows out of the internal flow path R0.

[0063] Since the mixing pipe 64 has a folded-back shape, it is easy to arrange the connection port 73 and the connection port 74 adjacent to each other. The connection port 74 is located closer to the connection port 73 than the bent portion 82, that is, closer to the water supply pipe 92 than the bent portion 82. Since the first guide flow path R11 is located in the vicinity of the water supply pipe 92, it is easy to arrange the connection port 74 near the first guide flow path R11.

[0064] Here, the flow of water and the liquid agent in the mixing pipe 64 will be described. Water flows from the water supply pipe 92 of the water supply device 9 into the upstream pipe 87 of the mixing pipe 64 through the connection port 73. The water passes through the bent portion 82, turns, and then flows into the downstream pipe 88, and merges and mixes with the liquid agent discharged from the discharge portion 72 in the downstream pipe 88 of the mixing pipe 64. The mixed liquid of water and the liquid agent (i.e., the washing water) flows into the first guide flow path R11 of the flow path member 60 through the connection port 74. The washing water flowing into the first guide flow path R11 flows along the first guide flow path R11 and is supplied to the washing tub 4 through the opening 66.

[0065] In the first embodiment, before the start of the discharge of the liquid agent, the water supply valve 91 is opened. Therefore, the liquid agent is discharged while water is flowing in the mixing pipe 64.

[0066] The mixing pipe 64 further has a branch flow path R3 that branches from the internal flow path R0 upstream of the plurality of discharge portions 72. The branch flow path R3 is a flow path that communicates the mixing pipe 64 with the flow path member 60 via a path different from the internal flow path R2 of the downstream pipe 88. The branch flow path R3 communicates with the second guide flow path R12 of the flow path member 60. The branch flow path R3 supplies the water supplied from the water supply device 9 to the second guide flow path R12 before merging with the liquid agent. That is, the branch flow path R3 supplies water for washing away the liquid agent B1 hanging downward from the connection portion 71 of the liquid agent pump 63 shown in FIG. 2C.

[0067] The branch flow path R3 branches from the internal flow path R0 at the second position P2 in the bent portion 82. The second position P2 is located upstream of the first position P1 corresponding to the discharge portion 72 of the first liquid agent pump 63.

[0068] The branch flow path R3 extends in the -Y direction from the second position P2 in plan view. The branch flow path R3 extends in the Y direction that intersects the X direction in which the upstream pipe 87 and the downstream pipe 88 extend in plan view.

[0069] A part of the branch flow path R3 is defined by the branch pipe 89. The branch pipe 89 extends in the Y direction between the bent portion 82 and the rear wall 60A of the flow path member 60.

[0070] The branch pipe 89 has an outlet 89B at the tip on the -Y side. The outlet 89B is connected to the rear wall 60A of the flow path member 60 and communicates with the second guide flow path R12. In plan view, the outlet 89B is connected to the flow path member 60 on the -X side of the plurality of liquid agent tanks 62.

[0071] The outlet 89B is connected to the rear wall 60A of the flow path member 60 at a position different from the connection port 74 of the mixing pipe 64. In the X direction, the connection port 74 is located between the connection port 73 of the mixing pipe 64 and the outlet 89B of the branch pipe 89. The X-direction interval between the connection port 74 and the connection port 73 of the mixing pipe 64 is smaller than the X-direction interval between the connection port 73 of the mixing pipe 64 and the outlet 89B of the branch pipe 89.

[0072] In the X direction, a plurality of liquid agent tanks 62 may be arranged between the connection port 74 of the mixing pipe 64 and the outlet 89B of the branch pipe 89.

[0073] Here, the flow of water regarding the branch flow path R3 will be described. A part of the water flowing from the water supply pipe 92 into the mixing pipe 64 branches off from the flow flowing into the downstream pipe 88 before merging with the liquid agent and flows into the branch flow path R3. The water flowing into the branch flow path R3 flows out from the outlet 89B and flows into the second guide flow path R12 of the flow path member 60. The water flowing into the second guide flow path R12 flows below the connection part 71 of the liquid agent pump 63. The water flowing below the connection part 71 can wash away the liquid agent dripping from the connection part 71.

[0074] Returning to FIG. 3, the water supply pipe 92 of the water supply device 9 forms a connection port 93 to which the connection port 73 of the mixing pipe 64 is connected.

[0075] In the first embodiment, the water supply pipe 92 is integrally formed with the case 61, and is formed integrally with the case 61 by, for example, vibration welding. With such a configuration, the manufacturing of the washing machine 1 can be simplified.

[0076] The flow path member 60 forms connection ports 76 and 77 to which the connection port 74 of the mixing pipe 64 and the outlet 89B of the branch pipe 89 are respectively connected.

[0077] As shown in FIGS. 3 and 4, in the flow path member 60, in the middle of the first guide flow path R11, a collection of a plurality of protrusions 69 protruding upward from the inner bottom surface 60B of the flow path member 60 is provided. The washing water flowing through the first guide flow path R11 collides with the plurality of protrusions 69. With such a configuration, the flow of the washing water can be decelerated.

[0078] As shown in FIG. 4, the connection port 74 is located in the vicinity of the upstream side of the plurality of protrusions 69. The connection port 74 is located on the +X side of the plurality of discharge parts 72 and at the +X side end of the downstream pipe 88. Therefore, the distance in the X direction between the connection port 74 and the plurality of protrusions 69 can be reduced, and the washing water supplied from the mixing pipe 64 to the flow path member 60 can be more surely made to collide with the plurality of protrusions 69.

[0079] Next, the mixing tube 64 will be described in more detail with reference to FIGS. 5A, 5B, and 6. FIG. 5A is a perspective view of the mixing tube 64. FIG. 5B is an exploded view of the mixing tube 64. FIG. 6 is a cross-sectional view of the mixing tube 64 as viewed from the Y direction, showing the internal flow path R2 of the downstream tube 88.

[0080] As shown in FIG. 5A, in the first embodiment, the upstream tube 87, the downstream tube 88, the bent portion 82, and the branch tube 89 are integrally formed. The upstream tube 87, the downstream tube 88, the bent portion 82, and the branch tube 89 are formed, for example, by a common resin molded part.

[0081] At the upper part of the mixing tube 64, a connection port 79 into which the discharge part 72 of the liquid agent pump 63 is inserted is formed. Corresponding to each liquid agent pump 63, three connection ports 79 are provided. The connection port 79 opens upward and receives the discharge part 72 extending in the Z direction. The connection port 79 may further be provided with a packing for sealing the discharge part 72.

[0082] From the upstream tube 87, an inflow tube 87S protrudes in the -Y direction, and from the downstream tube 88, an outflow tube 88S and a branch tube 89 protrude in the -Y direction. The connection port 73 at the end of the inflow tube 87S, the connection port 74 at the end of the outflow tube 88S, and the outflow port 89B at the end of the branch tube 89 open in the Y direction intersecting the opening direction (Z direction) of the connection port 79.

[0083] As shown in FIG. 5B, the mixing tube 64 has two members 64A and 64B divided in the Z direction. The members 64A and 64B are joined, for example, by vibration welding. On the other hand, the members 64A and 64B may be sealed with a packing or the like sandwiched therebetween.

[0084] The mixing pipe 64 has a partition wall portion 83 that separates the upstream pipe 87 and the downstream pipe 88. The partition wall portion 83 projects upward from the inner bottom surface of the mixing pipe 64 and extends in the X direction. The partition wall portion 83 defines the upstream pipe 87 by the side surface on the +Y side and defines the downstream pipe 88 by the side surface on the -Y side. That is, the upstream pipe 87 and the downstream pipe 88 are adjacent to each other via the partition wall portion 83.

[0085] The end portion 83A of the partition wall portion 83 on the -X side forms a gap G1 with the side wall of the bent portion 82. Through the gap G1, the internal flow path R1 of the upstream pipe 87 and the internal flow path R2 of the downstream pipe 88 communicate with each other. Therefore, the water flowing through the mixing pipe 64 flows so as to turn around the end portion 83A of the partition wall portion 83.

[0086] The portion of the mixing pipe 64 located on the -X side of the end portion 83A of the partition wall portion 83 is the bent portion 82.

[0087] As shown in FIG. 6, the partition wall portion 83 is formed by both of the members 64A and 64B. In other words, the partition wall portion 83 is divided in the Z direction.

[0088] Returning to FIG. 5B, the bent portion 82 has a partition wall portion 51 separately from the partition wall portion 83. The partition wall portion 51 projects from the side wall of the bent portion 82 into the bent portion 82 and defines a part of the branched flow path R3 inside. The partition wall portion 51 can divide the water flowing into the bent portion 82 into the water flowing into the branched flow path R3 and the water flowing into the internal flow path R2 of the downstream pipe 88. That is, the partition wall portion 51 can divide the water flowing into the bent portion 82 into the water supplied to the second guide flow path R12 and the water supplied to the first guide flow path R11.

[0089] As shown in FIG. 6, when viewed from the Y direction, the upstream pipe 87 and the downstream pipe 88 at least partially overlap. When viewed from the Y direction, the inner bottom surface S1 (see dotted line) of the upstream pipe 87 is at least partially located between the inner bottom surface S2 of the downstream pipe 88 and the upper inner wall surface S3 facing the inner bottom surface S2 in the downstream pipe 88.

[0090] The inner bottom surface S1 of the upstream pipe 87 is inclined downward with respect to the horizontal in the -X direction. The inner bottom surface S2 of the downstream pipe 88 is inclined downward with respect to the horizontal in the +X direction. The inner bottom surface S1 of the upstream pipe 87 and the inner bottom surface S2 of the downstream pipe 88 have the same inclination angle with respect to the horizontal. The inclination angles of the inner bottom surfaces S1 and S2 are, for example, 1.5°. Since the inclination angles of the inner bottom surfaces S1 and S2 determine the flow direction of water, the upstream and downstream in the upstream pipe 87 and the downstream pipe 88 are determined by the inclination angles of the inner bottom surfaces S1 and S2.

[0091] FIG. 7A is a cross-sectional view of the mixing pipe 64. FIG. 7B is a partial plan view of the mixing pipe 64.

[0092] As shown in FIG. 7A, when viewed from the X direction, the connection port 79 provided on the upper surface of the mixing pipe 64 is located near the center of the mixing pipe 64 in the Y direction and overlaps both the upstream pipe 87 and the downstream pipe 88. Therefore, the discharge portion 72 connected to the connection port 79 is arranged at a position overlapping both the upstream pipe 87 and the downstream pipe 88 in plan view.

[0093] With such a configuration, it becomes easier to shift the liquid agent pump 63 connected to the connection port 79 to the +Y side as compared with the case where the connection port 79 overlaps only the downstream pipe 88. Therefore, in accordance with the position of the liquid agent pump 63, the dimension of the liquid agent tank 62 in the Y direction can be increased, and the volume of the liquid agent tank 62 can be increased. Further, the mixing pipe 64 can stably support the liquid agent pump 63 from below. Furthermore, by arranging the connection port 79 so as to overlap both the upstream pipe 87 and the downstream pipe 88, the flow path width (width W2 described later) of the downstream pipe 88 to which the liquid agent pump 63 is connected can be made narrower than the size of the connection port 79. Therefore, the range in which the liquid agent pump 63 can be arranged can be widened, and the design freedom of the liquid agent supply unit 6 can be increased.

[0094] In Embodiment 1, the connection port 79 is located above the partition wall portion 83. When viewed from the X direction, the center of the connection port 79 is located directly above the partition wall portion 83. On the other hand, when viewed from the X direction, the center of the connection port 79 may be shifted with respect to the partition wall portion 83 between the position where the -Y direction wall portion of the connection port 79 overlaps with the front wall 64C and the position where the +Y direction wall portion of the connection port 79 overlaps with the rear wall of the mixing pipe 64.

[0095] The mixing pipe 64 has a guide portion 85 that guides the liquid agent discharged from the discharge portion 72 (i.e., the connection port 79) toward the internal flow path R2 of the downstream pipe 88 at a position overlapping with the connection port 79 (i.e., the discharge portion 72). The guide portion 85 is a wall surface that extends between the side wall 84 of the upstream pipe 87 and the partition wall portion 83 and is inclined downward (-Y side) toward the downstream pipe 88 with respect to the horizontal. The lower surface of the guide portion 85 forms the upper surface of the upstream pipe 87 and faces the internal flow path R1 of the upstream pipe 87.

[0096] As shown in FIG. 7B, the guide portion 85 includes a wall portion having a shape corresponding to the region of the connection port 79 that overlaps with the upstream pipe 87 in plan view. In Embodiment 1, the guide portion 85 includes a wall portion 85A having a shape that coincides with the region of the connection port 79 that overlaps with the upstream pipe 87 in plan view. Since the connection port 79 is circular, the guide portion 85 includes a wall portion 85A having a bow-shaped in plan view.

[0097] Returning to FIG. 7A, in the mixing pipe 64, the internal flow path R1 of the upstream pipe 87 is sealed with respect to the connection port 79 (i.e., the discharge portion 72) by the guide portion 85 and the partition wall portion 83. With such a configuration, even when the connection port 79 is located near the center of the mixing pipe 64, the liquid agent discharged from the discharge portion 72 can flow into the internal flow path R2 of the downstream pipe 88 instead of the internal flow path R1 of the upstream pipe 87.

[0098] On the other hand, the internal flow path R2 of the downstream pipe 88 communicates with the connection port 79 (i.e., the discharge portion 72). That is, the discharge portion 72 is connected to the downstream pipe 88, and the liquid agent is discharged into the internal flow path R2. With such a configuration, compared with the case where the liquid agent is discharged into the internal flow path R1 of the upstream pipe 87, the distance that the liquid agent flows in the mixing pipe 64 can be reduced, and the possibility of the liquid agent remaining can be reduced.

[0099] In the downstream pipe 88, a protrusion 55 protruding upward from the inner bottom surface S2 is provided below the connection port 79 (i.e., the discharge part 72). As shown in FIG. 6, the downstream pipe 88 has a protrusion 55 directly below each connection port 79 in the vertical direction.

[0100] FIG. 8 is a cross-sectional view of the lower member 64B of the mixing pipe 64, showing a cross-section on the +Y side from the front wall 64C so that the protrusion 55 can be seen.

[0101] As shown in FIG. 8, the protrusion 55 is adjacent to the partition wall portion 83 and has a substantially semi-circular shape protruding in the -Y direction from the partition wall portion 83 in plan view. The substantially semi-circular shape of the protrusion 55 corresponds to the substantially semi-circular shape of the discharge part 72 projected onto the downstream pipe 88 in plan view.

[0102] FIG. 9A is a cross-sectional view of the protrusion 55. As shown in FIG. 9A, the protrusion 55 protrudes higher on the upstream side (-X side) than on the downstream side (+X side). The protrusion 55 has a rising part 56 and an upper surface 57.

[0103] The rising part 56 is a part that rises upward from the inner bottom surface S2 so as to face the flow of water in the downstream pipe 88 at the upstream end (-X end) of the protrusion 55. With such a configuration, the water flowing through the downstream pipe 88 can be made to collide with the rising part 56 to generate a turbulent flow. Due to the turbulent flow, the water is more likely to mix with the liquid agent discharged from the discharge part 72. Also, the water can be made to collide with the rising part 56 and bounce upward toward the upper discharge part 72. The bounced-up water can wash away the liquid agent adhering to the discharge part 72.

[0104] The rising part 56 extends along the vertical direction (Z direction). In Embodiment 1, the rising part 56 is inclined with respect to the vertical direction (Z direction). Specifically, the rising part 56 is inclined such that the inclination angle θ1 with the inner bottom surface S2 is substantially vertical (80° or more) or an obtuse angle. The inclination angle θ1 of the rising part 56 is larger than the inclination angle θ2 of the upper surface 57.

[0105] The rising portion 56 has a height of 3 mm or more from the inner bottom surface S2, for example.

[0106] The upper surface 57 extends downstream from the upstream end 57A which is the upper end of the rising portion 56, and is a surface facing the discharge portion 72 and receiving the liquid agent discharged from the discharge portion 72.

[0107] As shown in FIG. 9A, the upper surface 57 is inclined at an inclination angle θ2 downward with respect to the inner bottom surface S2 toward the downstream. In other words, the inclination angle θ2 of the upper surface 57 is larger than the inclination angle of the inner bottom surface S2. With such a configuration, the liquid agent that has fallen onto the upper surface 57 does not remain on the upper surface 57 and flows toward the downstream end 57B. Since the inclination angle θ2 of the upper surface 57 is larger than the inclination angle of the inner bottom surface S2, the flow of the liquid agent toward the downstream is promoted as compared with the case where it falls onto the inner bottom surface S2. The inclination angle θ2 of the upper surface 57 is, for example, 15°.

[0108] Due to the inclination angle θ2, the downstream end 57B of the upper surface 57 is lower than the upstream end 57A of the upper surface 57. The downstream end 57B of the upper surface 57 may be substantially at the same height as the inner bottom surface S2. No step is provided between the downstream end 57B of the upper surface 57 and the inner bottom surface S2 so that the liquid agent accumulates.

[0109] The protruding portion 55 has a concave portion 58 on the surface opposite to the inner bottom surface S2. That is, the protruding portion 55 is hollow. With such a configuration, the weight of the mixing tube 64 can be reduced, and it becomes easy to connect the mixing tube 64 to the flow path member 60.

[0110] FIG. 9B is a plan view of the protruding portion 55. FIG. 9C is a schematic plan view of the protruding portion 55 and the connection port 79.

[0111] As shown in FIG. 9B, the protrusion 55 overlaps with the connection port 79 in the downstream pipe 88 in a plan view. In Embodiment 1, the protrusion 55 overlaps with the entire connection port 79 in the downstream pipe 88. As shown in FIG. 9C, in a plan view, the protrusion 55 has an area E2 that is equal to or larger than the opening area E1 (hatched area) of the connection port 79 in the downstream pipe 88.

[0112] In other words, as shown in FIG. 9B, the contour C1 of the protrusion 55 that is away from the partition wall portion 83 is located outside the outer periphery of the connection port 79 in the downstream pipe 88.

[0113] On the other hand, the contour C1 of the protrusion 55 has a gap G2 with the front wall 64C of the downstream pipe 88 that extends in the X direction facing the partition wall portion 83. The water that does not cross the protrusion 55 can flow to the downstream side of the protrusion 55 by passing through the gap G2. Since the protrusion 55 is adjacent to the partition wall portion 83 and is shifted toward the +Y side, the gap G2 can be made wider.

[0114] In Embodiment 1, the contour C1 of the protrusion 55 extends in an arc shape along the outer periphery of the discharge portion 72.

[0115] The upstream end portion 55A of the contour C1 of the protrusion 55 extends obliquely with respect to the direction (Y direction) perpendicular to the water flow direction (X direction). In Embodiment 1, the upstream end portion 55A of the contour C1 extends obliquely away from the partition wall portion 83 toward the downstream. Here, the upstream end portion 55A of the protrusion 55 is a portion on the -X side of the center of the protrusion 55 in the X direction and includes the rising portion 56.

[0116] The downstream end portion 55B of the contour C1 extends while being inclined in the opposite direction to the upstream end portion 55A. In Embodiment 1, the downstream end portion 55B of the contour C1 extends obliquely toward the partition wall portion 83. With such a configuration, it becomes easier to secure a flow path for the liquid agent and water to flow between the protrusion 55 and the front wall 64C.

[0117] As shown in FIG. 7B, a guide portion 85 is located on the opposite side of the protrusion portion 55 with the partition portion 83 interposed therebetween. In a plan view, the guide portion 85 is aligned with the protrusion portion 55 in the Y direction. The liquid agent discharged to the guide portion 85 is guided to the protrusion portion 55 in the -Y direction.

[0118] Returning to FIG. 7A, the discharge port 72A formed at the end of the discharge portion 72 is disposed at a position lower than the connection port 79. For example, the Z-direction interval D1 between the end of the discharge portion 72 and the connection port 79 is larger than the Z-direction interval D2 between the end of the discharge portion 72 and the guide portion 85.

[0119] The connection port 79 is separated from the front wall 64C of the downstream pipe 88 in the +Y direction. A step 86 is formed on the -Y side of the connection port 79. With such a configuration, interference with the components of the liquid agent pump 63 protruding downward can be avoided.

[0120] The width W2 of the internal flow path R2 in the Y direction is larger than the width W1 of the internal flow path R1 in the Y direction. When the width W2 of the internal flow path R2 in the Y direction is larger than the width W1 of the internal flow path R1 in the Y direction, in the internal flow path R2 through which the liquid agent flows in addition to water, the liquid flows more easily. On the other hand, the width W2 of the internal flow path R2 may be the same as the width W1 of the internal flow path R1, or may be smaller than the width W1 of the internal flow path R1.

[0121] Subsequently, the structure of the branch flow path R3 will be described in more detail with reference to FIGS. 10A to 11B. FIGS. 10A and 10B are perspective views of a part of the lower member 64B of the mixing pipe 64 in the vicinity of the branch flow path R3. FIGS. 11A and 11B are cross-sectional views of a part of the lower member 64B of the mixing pipe 64 in the vicinity of the branch flow path R3.

[0122] As shown in FIGS. 10A and 10B, the bent portion 82 has a side wall 82A extending along the Y direction and a front wall 82B extending in the X direction. The front wall 82B is provided adjacent to the front wall 64C of the downstream pipe 88. The front wall 82B extends continuously from the front wall 64C.

[0123] As shown in Fig. 11A, a communication port 82C is provided in the front wall 82B. The communication port 82C communicates with the outlet 89B of the branch flow path R3. The partition wall portion 51 protrudes in the +Y direction from the edge of the communication port 82C into the bent portion 82.

[0124] Returning to Figs. 10A and 10B, the partition wall portion 51 has a first portion 51A extending along the vertical direction and a second portion 51B extending along the horizontal direction from the upper end of the first portion 51A. The second portion 51B is provided at a position lower than the upper surface of the member 64B joined to the upper member 64A.

[0125] As shown in Fig. 11B, the +Y-direction tip 51C of the partition wall portion 51 is located between the partition wall portion 83 and the side wall 82A, that is, within the interval G1. On the other hand, the tip 51C of the partition wall portion 51 may be located on the +Y side of the partition wall portion 83.

[0126] The tip 51C of the partition wall portion 51 divides the interval G1 into the inlet 89A of the branch flow path R3 and the inlet 88A of the downstream pipe 88. That is, the tip 51C of the partition wall portion 51 defines the second position P2 where the branch flow path R3 branches from the internal flow path R0.

[0127] Specifically, the tip 51C defines the inlet 89A of the branch flow path R3 between itself and the side wall 82A, and defines the inlet 88A of the downstream pipe 88 between itself and the partition wall portion 83. The first portion 51A extending in the -Y direction from the tip 51C defines the branch flow path R3 (on the -X side) between itself and the side wall 82A, and defines the internal flow path R2 of the downstream pipe 88 (on the +X side) on the opposite side. The water flowing through the internal flow path R1 of the upstream pipe 87 and reaching the interval G1 is divided by the partition wall portion 51 into the water flowing into the branch flow path R3 and the water flowing into the internal flow path R2 of the downstream pipe 88.

[0128] The inlet 89A and the inlet 88A are arranged side by side in the X direction. In Embodiment 1, the opening area of the inlet 89A is smaller than the opening area of the inlet 88A.

[0129] Since the tip 51C of the partition portion 51 is located within the interval G1, when viewed from the X direction, the tip 51C of the partition portion 51 overlaps with the partition portion 83. When viewed from the X direction, the partition portion 51 closes at least the lower portion of the downstream pipe 88.

[0130] On the downstream side (-Y side) of the inflow port 89A, the side wall 82A bulges in the -X direction. Therefore, the branch flow path R3 has a cross-sectional area larger than the opening area of the inflow port 89A downstream of the inflow port 89A. By protruding the side wall 82A in the -X direction, it is possible to secure the cross-sectional area of the branch flow path R3 downstream of the inflow port 89A while keeping the inflow port 89A small.

[0131] As shown in FIG. 11A, a branch pipe 89 is connected to the communication port 82C on the side opposite to the partition portion 51. The branch pipe 89 protrudes in the -Y direction from the communication port 82C. The branch pipe 89 extends so as to be continuous with the side wall 82A and the partition portion 51 in plan view.

[0132] The opening area of the outflow port 89B at the tip of the branch pipe 89 is larger than the opening area of the inflow port 89A. For example, the opening area of the outflow port 89B is larger than twice the opening area of the inflow port 89A.

[0133] Also, when comparing the inner bottom surface of the bent portion 82 in the vicinity of the inflow port 89A, the inner bottom surface on the upstream side of the inflow port 89A and the inner bottom surface on the downstream side of the inflow port 89A have substantially the same height. In other words, upstream of the inflow port 89A, there is no structure such as a protrusion that protrudes upward from the inner bottom surface of the bent portion 82 to obstruct the flow of water toward the branch flow path R3.

[0134] The lowest point of the inflow port 89A and the lowest point of the inflow port 88A of the downstream pipe 88 have substantially the same height. Therefore, the water that has reached the interval G1 can flow into both the branch pipe 89 and the downstream pipe 88.

[0135] Downstream of the second position P2 where the branch flow path R3 branches off from the internal flow path R0, a protrusion 55 is provided. Since the upper surface 57 of the protrusion 55 slopes downward toward the downstream, it is possible to suppress the liquid agent discharged onto the protrusion 55 from flowing back upstream of the protrusion 55. Therefore, it is possible to suppress the liquid agent from flowing back to the second position P2 upstream of the protrusion 55 and to suppress the liquid agent from flowing into the branch flow path R3.

[0136] FIG. 12 is a perspective view showing the vicinity of the connection port 77 of the flow path member 60 to which the branch pipe 89 is connected. As shown in FIG. 12, the flow path member 60 has a wall portion 53 that extends from the connection port 77 and defines a flow path R4 inside. The flow path R4 communicates with the branch flow path R3 via the connection port 77 and extends in the Y direction from the connection port 77. An opening 54 facing in the X direction is formed in the wall portion 53. The flow path R4 communicates with the second guide flow path R12 via the wall portion 53. The water that has flowed into the branch flow path R3 flows into the flow path R4 from the connection port 77 and into the second guide flow path R12 through the opening 54.

[0137] When viewed from the X direction, the width W3 of the opening 54 is larger than the height H3 of the opening 54. With such a configuration, it is possible to increase the opening area while reducing the dimension in the height direction of the flow path R4. Therefore, it is possible to suppress the water from flowing in the Z direction and to suppress the water from jumping out of the opening 62C (FIG. 2C) and flowing into the inside of the case 61.

[0138] Subsequently, the water supply pipe 92 of the water supply device 9 will be described in more detail with reference to FIG. 13. FIG. 13 is a cross-sectional view of the case 61, the flow path member 60, and the water supply pipe 92.

[0139] As shown in FIG. 13, the water supply pipe 92 has a wall portion 96 that extends along the Z direction. The wall portion 96 defines a water supply flow path L0 on both sides (+Y side and -Y side). That is, the water supply flow path L0 defined by the wall portion 96 turns back in the Z direction.

[0140] Water from the water supply valve 91 flows into the flow path L1 on the +Y side of the wall portion 96 and accumulates in the flow path L1. When the water level in the flow path L1 exceeds the upper end of the wall portion 96, it overflows from the flow path L1 and flows into the flow path L2 on the -Y side of the wall portion 96 (see arrow A1). The water that has flowed into the flow path L2 flows into a mixing pipe 64 (not shown) through the connection port 93 (see arrow A2).

[0141] Near the upper end of the wall portion 96 downstream of the flow path L1, an opening 95 is provided in the wall portion of the water supply pipe 92. The opening 95 is located above a plurality of protrusions 69 provided in the first guide flow path R11.

[0142] A part of the water that has flowed into the flow path L2 passes through the opening 95 and falls onto a plurality of protrusions 69 in the first guide flow path R11 (see arrow A3). When the washing water is flowing through the first guide flow path R11, the water falling from the opening 95 is struck against the washing water decelerated by the plurality of protrusions 69, and the washing water can be foamed.

[0143] [Summary] Summarizing the above description, the features of the present disclosure will be described.

[0144] In the washing machine 1 according to the first embodiment, the branch flow path R3 branches from the internal flow path R0 of the mixing pipe 64 upstream of the discharge portion 72. Therefore, water before merging with the liquid agent can be supplied to the second guide flow path R12. Since the branch flow path R3 branches from the bent portion 82 and extends in the Y direction intersecting the upstream pipe 87 and the downstream pipe 88, water flowing with a Y component after bending at the bent portion 82 easily flows into the branch flow path R3.

[0145] The branch flow path R3 is defined by the partition wall portion 51. Since the tip 51C of the partition wall portion 51 is located inside the interval G1, the water that has reached the interval G1 can be divided into water flowing toward the branch flow path R3 and water flowing toward the downstream pipe 88. That is, while ensuring the water flowing into the branch flow path R3, water can also flow into the downstream pipe 88. Further, compared with the case where the partition wall portion 51 terminates before the interval G1 (-Y side), it is easy to suppress the backflow of water from the downstream pipe 88 to the branch flow path R3.

[0146] Since the downstream pipe 88 is provided with the protrusion 55, by causing water to collide with the rising portion 56 to generate turbulent flow, the water is more likely to mix with the liquid agent. Since the upper surface 57 of the protrusion 55 is inclined downward toward the downstream, the liquid agent discharged toward the upper surface 57 can be collected on the downstream side of the protrusion 55 and merged with the turbulent water. When the liquid agent merges with the turbulent water, the liquid agent and water are well mixed, and the residue of the liquid agent in the mixing pipe 64 can be suppressed. Further, since the protrusion 55 is located below the discharge portion 72, the discharge portion 72 can be cleaned by causing water to collide with the rising portion 56 and scatter upward.

[0147] [Effect 1] According to the washing machine 1 according to the first embodiment, the following effects can be achieved.

[0148] The washing machine 1 of the first embodiment includes a washing tub 4, a water supply valve 91, a liquid agent tank 62 for storing a liquid agent to be supplied to the washing tub 4, a case 61 for housing the liquid agent tank 62, and a flow path member 60 provided below the case 61 and having a guide flow path for guiding the liquid agent and water to the washing tub 4. The washing machine 1 includes a pipe portion that supplies water supplied from the water supply valve 91 to the guide flow path, a connection portion 71 connected to the liquid agent tank 62, and a liquid agent pump 63 (liquid agent input device) having a discharge portion 72 that discharges the liquid agent flowing in through the connection portion 71 to a first position P1 in the middle of the pipe portion. The pipe portion has a branch flow path R3 that branches at a second position P2 upstream of the first position P1. The guide flow path has a first guide flow path R11 that communicates with the pipe portion downstream of the first position P1, and a second guide flow path R12 that communicates with the branch flow path R3 and passes below the connection portion 71.

[0149] With such a configuration, since the branch flow path R3 branches upstream of the discharge portion 72, water can be supplied to the second guide flow path R12. Therefore, in the second guide flow path R12, mixing of the liquid agent discharged from the liquid agent pump 63 and the liquid agent remaining on the inner bottom surface 60C is suppressed, and mixing of different types of liquid agents and generation of precipitates due to chemical reactions can be suppressed.

[0150] In the washing machine 1 according to the first embodiment, the pipe portion includes a water supply pipe 92 connected to the water supply valve 91 and a mixing pipe 64 that connects between the water supply pipe 92 and the flow path member 60. The first position P1 and the second position P2 are located on the mixing pipe 64.

[0151] With such a configuration, a branch flow path R3 for supplying water to the flow path member 60 can be provided in the mixing pipe 64 connected to the flow path member 60. Therefore, the structure of the branch flow path R3 can be simplified as compared with the case where the branch flow path R3 is provided in the water supply pipe 92.

[0152] In the washing machine 1 according to the first embodiment, the mixing pipe 64 is provided outside the case 61.

[0153] With such a configuration, the structure of the case 61 can be simplified.

[0154] In the washing machine 1 according to the first embodiment, the mixing pipe 64 has an upstream pipe 87 extending in the -X direction (first horizontal direction) in plan view, a downstream pipe 88 extending in the +X direction (second horizontal direction) opposite to the -X direction, and a bent portion 82 that bends between the upstream pipe 87 and the downstream pipe 88. The first position P1 is located on the downstream pipe 88.

[0155] With such a configuration, the distance that the liquid agent flows in the mixing pipe 64 can be shortened, and the residue of the liquid agent in the mixing pipe 64 can be suppressed.

[0156] In the washing machine 1 according to the first embodiment, the second position P2 is located at the bent portion 82.

[0157] With such a configuration, the inflow of the liquid agent into the branch flow path R3 can be suppressed. Therefore, in the second guide flow path R12, the mixing of the discharged liquid agent and the liquid agent remaining on the inner bottom surface 60C can be suppressed, and the mixing of different types of liquid agents and the generation of precipitates due to chemical reactions can be suppressed.

[0158] In the washing machine 1 of Embodiment 1, the bent portion 82 has a communication port 82C that communicates with the outlet 89B of the branch flow path R3 in the front wall 82B (wall portion), and a partition wall portion 51 (first partition wall portion) that protrudes from the edge of the communication port 82C into the bent portion 82. The second position P2 is located at the tip 51C of the partition wall portion 51.

[0159] With such a configuration, the water flowing into the bent portion 82 can be more reliably guided to the branch flow path R3.

[0160] In the washing machine 1 of Embodiment 1, the communication port 82C is provided in the front wall 82B that extends in the +X direction adjacent to the downstream pipe 88, and the partition wall portion 51 extends in the Y direction (third horizontal direction) that intersects the +X direction in plan view.

[0161] With such a configuration, the water that bends from the upstream pipe 87 to the downstream pipe 88 flows with a Y component. Therefore, the water can be efficiently guided to the branch flow path R3.

[0162] In the washing machine 1 of Embodiment 1, the mixing pipe 64 has a partition wall portion 83 (second partition wall portion) that separates the upstream pipe 87 and the downstream pipe 88, and the upstream pipe 87 and the downstream pipe 88 are adjacent to each other via the partition wall portion 83. The partition wall portion 83 has a distance G1 from the side wall 82A (wall portion) of the bent portion 82. The tip 51C of the partition wall portion 51 is located within the distance G1.

[0163] With such a configuration, the upstream pipe 87 and the downstream pipe 88 communicate with each other via the distance G1. The partition wall portion 51 can divide the water that has reached the distance G1 from the upstream pipe 87 into water flowing toward the branch flow path R3 and water flowing toward the downstream pipe 88.

[0164] In the washing machine 1 of Embodiment 1, the branch flow path R3 is located on the -X side of the partition wall portion 51, and the downstream pipe 88 is located on the +X side of the partition wall portion 51.

[0165] With such a configuration, the branch flow path R3 can be provided at the -X side end of the mixing pipe 64, simplifying the structure of the mixing pipe 64. Further, the branch flow path R3 can be inflated in the -X direction, increasing the cross-sectional area of the branch flow path R3 and facilitating the flow of water in the branch flow path R3.

[0166] In the washing machine 1 of the first embodiment, the opening area of the inlet 89A of the branch flow path R3 is smaller than the opening area of the outlet 89B of the branch flow path R3.

[0167] With such a configuration, by making the inlet 89A smaller, the amount of water flowing into the branch flow path R3 can be restricted, ensuring the amount of water flowing to the discharge part 72 in the mixing pipe 64. By making the outlet 89B larger, it becomes easier for water to pass through the branch flow path R3.

[0168] In the washing machine 1 of the first embodiment, the pipe part has a protrusion 55 that protrudes upward from the inner bottom surface S2 below the discharge part 72, and the protrusion 55 has an upper surface 57 that slopes downward with respect to the horizontal toward the downstream.

[0169] With such a configuration, since it is located below the discharge part 72, the protrusion 55 is located downstream of the second position P2. Due to the inclination of the upper surface 57, it is possible to suppress the backflow of the liquid agent discharged onto the protrusion 55 upstream of the protrusion 55. Therefore, it is possible to suppress the backflow of the liquid agent to the second position P2 upstream of the protrusion 55 and suppress the liquid agent from flowing into the branch flow path R3.

[0170] [Effect 2] According to the washing machine 1 according to the first embodiment, the following effects can be achieved.

[0171] The washing machine 1 according to the first embodiment includes a washing tub 4, a water supply device 9, a chemical tank 62 for storing chemicals to be supplied to the washing tub 4, a downstream pipe 88 (pipe portion), and a chemical pump 63 (chemical input device). The downstream pipe 88 allows water supplied from the water supply device 9 to flow and enter the washing tub 4. The chemical pump 63 has a discharge portion 72 that discharges the chemicals stored in the chemical tank 62 into the internal flow path R2 of the downstream pipe 88. The downstream pipe 88 has a protrusion 55 that protrudes upward from the inner bottom surface S2 below the discharge portion 72, and the protrusion 55 has a rising portion 56 that rises on the upstream side.

[0172] With such a configuration, the rising portion 56 generates turbulent water flow, promoting the mixing of water and chemicals and suppressing the residue of chemicals in the downstream pipe 88. Further, the water flowing through the downstream pipe 88 collides with the rising portion 56 and then bounces upward to hit the discharge portion 72. Therefore, the discharge portion 72 can be cleaned, and the residue of chemicals in the discharge portion 72 can be suppressed. Thus, the sticking of chemicals due to drying in the downstream pipe 88 and the discharge portion 72 can be suppressed.

[0173] In the washing machine 1 according to the first embodiment, the protrusion 55 has an upper surface 57 that faces the discharge portion downstream of the rising portion 56, and the upper surface 57 is inclined downward with respect to the horizontal toward the downstream.

[0174] With such a configuration, the chemicals discharged from the discharge portion 72 and falling onto the upper surface 57 flow downstream along the inclination of the upper surface 57, so that the residue of chemicals on the upper surface 57 can be suppressed.

[0175] In the washing machine 1 according to the first embodiment, the inner bottom surface S2 of the downstream pipe 88 is inclined downward with respect to the horizontal toward the downstream, and the inclination angle of the upper surface 57 is larger than the inclination angle of the inner bottom surface S2.

[0176] With such a configuration, the chemicals flowing downstream along the upper surface 57 can be made to flow by riding on the water flow from upstream to downstream in the downstream pipe 88, so that the residue of chemicals on the upper surface 57 can be further suppressed.

[0177] In the washing machine 1 according to the first embodiment, when viewed from the water flow direction, the protrusion 55 has a gap G2 with the front wall 64C (the first side wall) of the downstream pipe 88.

[0178] With such a configuration, even when the amount of water flowing into the downstream pipe 88 is small and the water cannot overcome the protrusion 55, the water and the liquid agent can pass through the gap G2. Therefore, the residue of the water and the liquid agent in the downstream pipe 88 can be suppressed.

[0179] In the washing machine 1 according to the first embodiment, when viewed from the water flow direction, the protrusion 55 is adjacent to the partition wall portion 83 (the second side wall of the pipe portion) facing the front wall 64C.

[0180] With such a configuration, by shifting the protrusion 55 to one side in the downstream pipe 88, the gap G2 between the protrusion 55 and the front wall 64C can be increased. The residue of the water and the liquid agent in the downstream pipe 88 can be further suppressed.

[0181] In the washing machine 1 according to the first embodiment, when viewed from the vertical direction, the upstream end portion 55A of the protrusion 55 extends obliquely with respect to the direction orthogonal to the water flow direction.

[0182] With such a configuration, the liquid agent and the water can easily flow along the upstream end portion 55A of the protrusion 55. Therefore, the residue of the water and the liquid agent in the downstream pipe 88 can be suppressed.

[0183] In the washing machine 1 according to the first embodiment, when viewed from the water flow direction, the discharge portion 72 is disposed at a position protruding horizontally from the downstream pipe 88. The washing machine 1 further includes a guide portion 85 that guides the liquid agent from below the discharge portion 72 protruding from the downstream pipe 88 toward the protrusion 55.

[0184] With such a configuration, even when the discharge portion 72 is provided at a position deviated from the downstream pipe 88, the liquid agent can be guided toward the protrusion 55.

[0185] The washing machine 1 according to the first embodiment has a plurality of discharge portions 72, and the downstream pipe 88 has a protrusion 55 below each discharge portion 72.

[0186] With such a configuration, even in the liquid agent supply unit 6 having a plurality of discharge portions 72, the water flowing through the downstream pipe 88 can be splashed upward to clean the discharge portions 72.

[0187] Note that the present disclosure is not limited to the above-described embodiment, and can be implemented in various other modes.

[0188] Although an example in which the washing machine 1 has a plurality of liquid agent tanks 62 and a plurality of liquid agent pumps 63 has been described, the present disclosure is not limited to this. For example, the washing machine 1 may have one liquid agent tank 62 or one liquid agent pump 63. One liquid agent pump 63 may have a plurality of discharge portions 72. Further, when the washing machine 1 has a plurality of liquid agent pumps 63, it is sufficient that one or more liquid agent pumps 63 are connected to the downstream pipe 88 of the mixing pipe 64.

[0189] Although an example in which the liquid agent pump 63 is directly connected to the mixing pipe 64 has been described, the present disclosure is not limited to this. For example, the liquid agent pump 63 may be connected to the mixing pipe 64 via another tubular member.

[0190] Although an example in which the liquid agent pump 63 is connected to the mixing pipe 64 from above has been described, the present disclosure is not limited to this. For example, the liquid agent pump 63 may be connected to the side wall or the lower wall of the mixing pipe 64.

[0191] Although an example in which the upstream pipe 87, the downstream pipe 88, and the partition portion 83 extend in the X direction has been described, the present disclosure is not limited to this. The upstream pipe 87, the downstream pipe 88, and the partition portion 83 may extend in a direction including a Y component or a Z component. Further, in order to allow the liquid to flow in the internal flow paths R1 and R2, the upstream pipe 87 and the downstream pipe 88 may be inclined with respect to the horizontal.

[0192] Although an example in which the discharge part 72 overlaps both the upstream pipe 87 and the downstream pipe 88 has been described, the present invention is not limited to this. The discharge part 72 may overlap only the downstream pipe 88 in a plan view.

[0193] Although an example in which the downstream pipe 88 is located between the upstream pipe 87 and the case 61 in a plan view has been described, the present invention is not limited to this. The upstream pipe 87 may be located between the downstream pipe 88 and the case 61.

[0194] Although an example in which the inner bottom surface S1 of the upstream pipe 87 and the inner bottom surface S2 of the downstream pipe 88 have the same inclination angle with respect to the horizontal has been described, the present invention is not limited to this. For example, the inclination angle of the inner bottom surface S2 of the downstream pipe 88 may be made larger than that of the inner bottom surface S1 of the upstream pipe 87. With such a configuration, the residue of the liquid agent can be further suppressed.

[0195] Although an example in which the downstream pipe 88 is connected to the rear wall 60A of the flow path member 60 has been described, the present invention is not limited to this. For example, the downstream pipe 88 may be connected to another side wall of the flow path member 60.

[0196] Although an example in which the guide part 85 extends between the side wall 84 and the partition part 83 of the mixing pipe 64 has been described, the present invention is not limited to this. The guide part 85 and the partition part 83 may have a space in the Z direction.

[0197] Although an example in which the upper surface 57 is inclined with respect to the inner bottom surface S2 has been described, the present invention is not limited to this. The upper surface 57 may be inclined downward with respect to the horizontal toward the downstream.

[0198] Although an example in which the protrusion 55 overlaps the entire connection port 79 in the downstream pipe 88 has been described, the present invention is not limited to this. The protrusion 55 may overlap a part of the connection port 79 in the downstream pipe 88.

[0199] Although an example in which the protrusion 55 is adjacent to the partition part 83 has been described, the present invention is not limited to this. The protrusion 55 may have a space from the partition part 83.

[0200] Although an example in which the protrusion 55 has an arc shape has been described, the present invention is not limited thereto. The protrusion 55 may have any shape.

[0201] Although the liquid agent pump 63 has been described as an example of the liquid agent charging device, the present invention is not limited thereto. The liquid agent charging device may be a device that charges a liquid agent by an aspirator or a solenoid valve.

[0202] The washing machine according to the first aspect includes a washing tub, a water supply device, a liquid agent tank that stores a liquid agent to be supplied to the washing tub, a pipe portion through which water supplied from the water supply device and flowing into the washing tub flows, and a liquid agent charging device having a discharge portion that discharges the liquid agent stored in the liquid agent tank into an internal flow path of the pipe portion. The pipe portion has a protrusion protruding upward from the inner bottom surface below the discharge portion, and the protrusion has a rising portion that rises on the upstream side.

[0203] As the washing machine according to the second aspect, in the washing machine according to the first aspect, the protrusion has an upper surface facing the discharge portion downstream of the rising portion, and the upper surface is inclined downward with respect to the horizontal toward the downstream.

[0204] As the washing machine according to the third aspect, in the washing machine according to the second aspect, the inner bottom surface of the pipe portion is inclined downward with respect to the horizontal toward the downstream, and the inclination angle of the upper surface is larger than the inclination angle of the inner bottom surface.

[0205] As the washing machine according to the fourth aspect, in the washing machine according to any one of the first to third aspects, when viewed from the water flow direction, the protrusion has a space between the protrusion and the first side wall of the pipe portion.

[0206] As the washing machine according to the fifth aspect, in the washing machine according to the fourth aspect, when viewed from the water flow direction, the protrusion is adjacent to the second side wall of the pipe portion facing the first side wall.

[0207] As the washing machine in the sixth aspect, in the washing machine in any one of the first to fifth aspects, when viewed from the vertical direction, the upstream end of the protrusion extends obliquely with respect to the direction orthogonal to the water flow direction.

[0208] As the washing machine in the seventh aspect, in the washing machine in any one of the first to sixth aspects, when viewed from the water flow direction, the discharge part is arranged at a position protruding horizontally from the pipe part, and further has a guiding part for guiding the liquid agent from below the discharge part protruding from the pipe part toward the protrusion.

[0209] As the washing machine in the eighth aspect, in the washing machine in any one of the first to seventh aspects, it has a plurality of discharge parts, and the pipe part has a protrusion below each discharge part.

[0210] Although the present disclosure is fully described in relation to the preferred embodiments with reference to the accompanying drawings, various modifications and corrections are obvious to those skilled in this technology. Such modifications and corrections should be understood to be included therein as long as they do not deviate from the scope of the present invention according to the appended claims.

Industrial Applicability

[0211] The washing machine of the present disclosure can suppress the residue of the liquid agent when it has an automatic liquid agent input function, and thus is useful as a household washing machine, a commercial washing machine, or any type of washing and drying machine.

Explanation of Signs

[0212] 1 Washing machine 2 Housing 3 Outer tub 4 Washing tub 5 Driving part 6 Liquid agent supply unit 9 Water supply device 11 Drain valve 12 Control part 60 Flow path member 61 Case 61A Rear wall 62 Liquid Agent Tank 63 Liquid Agent Pump 64 Mixing Tube 66 Opening 69 Projection 72 Discharge Port 73 Connection Port 74 Connection Port 82 Bending Portion 83 Partition Portion 85 Guide 87 Upstream Pipe 88 Downstream Pipe R11 First Guide Flow Path R12 Second Guide Flow Path R3 Branch Flow Path

Claims

1. A washing tub, a water supply device, a chemical tank for storing chemicals to be supplied to the washing tub, a pipe section through which water supplied from the water supply device and flowing into the washing tub flows, a chemical input device having a discharge section for discharging the chemicals stored in the chemical tank into the internal flow path of the pipe section, and the pipe section has a protrusion protruding upward from the inner bottom surface below the discharge section, the protrusion has a rising section that rises on the upstream side, a washing machine.

2. The protrusion has an upper surface facing the discharge section downstream of the rising section, the upper surface is inclined downward with respect to the horizontal toward the downstream, the washing machine according to Claim 1.

3. The inner bottom surface of the pipe section is inclined downward with respect to the horizontal toward the downstream, the inclination angle of the upper surface is larger than the inclination angle of the inner bottom surface, the washing machine according to Claim 2.

4. When viewed from the water flow direction, the protrusion has a gap with the first side wall of the pipe section, the washing machine according to Claim 1.

5. When viewed from the water flow direction, the protrusion is adjacent to the second side wall of the pipe section facing the first side wall, the washing machine according to Claim 4.

6. When viewed from the vertical direction, the upstream end of the protrusion extends obliquely with respect to the direction orthogonal to the water flow direction, the washing machine according to Claim 1.

7. When viewed from the water flow direction, the discharge section is disposed at a position protruding horizontally from the pipe section, the washing machine according to Claim 1, further comprising a guiding section for guiding the chemical from below the discharge section protruding from the pipe section toward the protrusion.

8. having a plurality of the discharge sections, the pipe section has the protrusion below each of the discharge sections, the washing machine according to any one of Claims 1 to 7.

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