washing machine

Abstract

To provide a washing machine with improved stability in supplying a liquid agent into a washing tub from a tank.SOLUTION: A washing machine of the present disclosure comprises a washing tub rotatably disposed in a housing, a first tank that accommodates a liquid agent supplied to the washing tub, a first automatic liquid agent feeding device connected to a first connection disposed in the first tank, and a first mesh part having a plurality of through-holes, which is disposed in the first tank and tilted against the bottom face of the first tank, on the upstream of the first connection. The apex of the first mesh is set below a specific height.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present disclosure relates to washing machines. [Background technology]

[0002] For example, Patent Document 1 discloses a washing machine having a washing tub and a tank that contains a liquid agent to be supplied to the washing tub.

[0003] In the washing machine described in Patent Document 1, a filter made of a mesh member is housed in the tank, and the mesh member is disposed between the top opening of the tank and the discharge port. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2019 / 039141 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in a washing machine having a tank for storing a liquid agent, it is required that the liquid agent be stably supplied from the tank to the washing tub.

[0006] Therefore, an object of the present disclosure is to solve the above-mentioned problems and to provide a washing machine that can stably supply liquid to the washing tub. [Means for solving the problem]

[0007] A washing machine according to one embodiment of the present disclosure comprises a washing tub rotatably mounted within a housing, a first tank for containing a liquid agent to be supplied to the washing tub, a first automatic liquid agent dispenser connected to a first connection part mounted on the first tank, and a first mesh part provided inside the first tank, positioned upstream of the first connection part and inclined with respect to the bottom surface of the first tank, and having a plurality of through holes, the apex of the first mesh part being set to a predetermined height or below. [Effects of the Invention]

[0008] According to the present disclosure, a washing machine capable of stably supplying a liquid agent to a washing tub can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] Schematic cross-sectional view of a washing machine according to a first embodiment of the present disclosure. [Figure 2] Schematic front view of a washing machine [Figure 3] Perspective view of the automatic insertion unit [Figure 4] A perspective view of a part of the automatic feeding unit [Figure 5] FIG. 1 is a perspective view showing a cross section of an automatic feeding unit; [Figure 6] A perspective view of the tank and the liquid agent supply device [Figure 7A] Diagram showing the inside of the tank [Figure 7B] Diagram showing the inside of the tank [Figure 8] A perspective view of a filter member [Figure 9] Schematic diagram of the mesh part [Figure 10A] A perspective view of a filter member [Figure 10B] Cross-sectional view of a filter member [Figure 11] Tank cross section [Figure 12] Enlarged cross-section of the tank [Figure 13A] Schematic cross-sectional view of the tank near the filter member [Figure 13B] Schematic cross-sectional view of the tank near the filter member [Figure 13C]Schematic cross-sectional view of the tank near the filter member [Figure 13D] Schematic cross-sectional view of the tank near the filter member [Figure 14A] Schematic cross-sectional view of the tank near the filter member [Figure 14B] Schematic cross-sectional view of the tank near the filter member [Figure 14C] Enlarged cross section of the mesh [Figure 14D] Enlarged cross section of the mesh [Figure 15A] Schematic cross-section of the tank [Figure 15B] Schematic cross-section of the tank [Figure 16] Graph showing the relationship between the remaining amount of liquid in each tank and the sensor output value in Modification 1 [Figure 17A] Schematic diagram of a washing machine according to a second embodiment of the present disclosure. [Figure 17B] Schematic diagram of a washing machine according to a second embodiment of the present disclosure. [Figure 18A] Perspective view of the tank [Figure 18B] Perspective view of the tank [Figure 19A] Top view showing the internal structure of the tank [Figure 19B] A perspective view showing the internal structure of the tank [Figure 19C] A perspective view showing the internal structure of the tank [Figure 20] Tank cross section [Figure 21] A perspective view of a filter member DETAILED DESCRIPTION OF THE INVENTION

[0010] (Findings that formed the basis of this disclosure) At the time when the inventors came up with the present disclosure, washing machines equipped with a liquid agent dispenser that automatically dispenses a liquid agent and a filter that filters out foreign matter were known.

[0011] The inventors of the present invention have discovered a problem that when a liquid agent is automatically dispensed into a washing machine equipped with a filter to separate the internal space of the liquid agent tank, if a high-viscosity liquid agent is filtered or if the filter has a fine mesh, the resistance to the liquid as it passes through the filter increases, and the amount of liquid agent dispensed into the washing tub may be less than the predetermined amount.The inventors of the present invention have also discovered a problem that, particularly when a mesh part is located at an upper part in the tank, air is likely to flow downstream of the mesh part, and the amount of liquid agent dispensed may be less than the predetermined amount.

[0012] To solve these problems, the inventors of the present invention have come up with the subject matter of the present disclosure.

[0013] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of already well-known matters or redundant description of substantially the same configuration may be omitted.

[0014] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0015] (Embodiment 1) A washing machine according to a first embodiment of the present disclosure will be described.

[0016] [Overall configuration] FIG. 1 is a schematic cross-sectional view showing a washing machine 1 according to a first embodiment of the present disclosure. FIG. 2 is a schematic front view of the washing machine 1. The washing machine 1 according to this embodiment is a washer / dryer having an automatic liquid dispenser function. In this specification, the liquid is a liquid used to wash laundry 15 such as clothes. The liquid may include a detergent, a fabric softener, and a neutral detergent.

[0017] As shown in FIG. 1, the washing machine 1 includes a housing 2, an outer tub 3, a washing tub 4, a drive unit 5, an automatic dosing unit 6, a connecting flow path 8, a water supply port 10, a drain valve 11, and a control unit C.

[0018] <Case> The housing 2 is a member that forms the exterior of the washing machine 1. An opening 20 and a door 21 that covers the opening 20 and can be opened and closed freely are provided on the front surface of the housing 2.

[0019] <Outer tank> The outer tub 3 is a generally cylindrical member provided inside the housing 2 and functions to store wash water. The outer tub 3 may also be referred to as a water tub. The outer tub 3 has a cylindrical portion 34 and a bottom portion 36 that closes one end of the cylindrical portion 34. The central axis V0 of the outer tub 3 passes through the center of the bottom portion 36. The central axis V0 is inclined relative to the horizontal. The outer tub 3 has an opening 31 facing the opening 20 of the housing 2, and is connected to the opening 20 of the housing 2 in a sealed manner by a bellows 32. The outer tub 3 has an opening 33 connected to the connecting flow path 8 for water flow, and a drain port 35 for draining the water from the outer tub 3 to the outside.

[0020] In the following description, the horizontal direction along the central axis V0 is referred to as the front-rear direction M (FIG. 1), and the horizontal direction perpendicular to the plane including the central axis V0 is referred to as the width direction K (FIG. 2). The front-rear direction M has a front side M1 toward the opening 31 and a rear side M2 ​​toward the bottom 36, and the width direction K has an outer side K1 away from the central axis V0 and a center side K2 toward the central axis V0.

[0021] <Washing tub> The washing tub 4 is a generally cylindrical member that is rotatable around a central axis V0 inside the outer tub 3 and that accommodates laundry 15, such as clothes. The washing tub 4 may also be called a drum or an inner tub. The washing tub 4 has a number of through-holes 40 formed therein. The through-holes 40 connect the washing tub 4 and the outer tub 3, allowing the wash water and detergent to move from the washing tub 4 to the outer tub 3. The washing tub 4 further has openings 41 at positions that face the opening 20 of the housing 2 and the opening 31 of the outer tub 3.

[0022] <Drive unit> The driving unit 5 is a member that drives the washing tub 4 to rotate around the central axis V0. The driving unit 5 has, for example, a motor that rotates the washing tub 4.

[0023] <Automatic feeding unit> The automatic dispensing unit 6 is a unit that automatically dispenses a predetermined amount of liquid agent from a tank that stores the liquid agent into the outer tub 3 and the washing tub 4. The automatic dispensing unit 6 supplies an appropriate amount of an appropriate type of liquid agent to the outer tub 3 and the washing tub 4 during the washing process, rinsing process, etc., depending on, for example, the amount and type of laundry 15. The automatic dispensing unit 6 is connected to the outer tub 3 via a connecting flow path 8 in order to supply the liquid agent to the outer tub 3 and the washing tub 4.

[0024] The automatic dispensing unit 6 includes a case 61, tanks 62A, 62B, and 62C (FIG. 3), liquid agent dispensing devices 63A, 63B, and 63C (FIG. 4), and a liquid agent discharge flow path 64.

[0025] As shown in FIG. 2, the automatic dosing unit 6 is provided inside the housing 2 diagonally above the outer tub 3, and has a shape that follows the outer periphery of the cylindrical portion 34 of the outer tub 3.

[0026] <Connection flow path> The connection flow path 8 is a flow path for supplying the liquid agent from the automatic dispensing unit 6 to the outer tank 3. The connection flow path 8 extends downward from the automatic dispensing unit 6 to the opening 33 of the outer tank 3.

[0027] <Water inlet> 1, the water supply port 10 is a connection port for connecting a hose that supplies water to the outer tub 3 via the automatic dosing unit 6. The water supply port 10 is provided on the top of the housing 2.

[0028] <Drain valve> The drain valve 11 is configured to be openable and closable, and when opened, drains the water stored in the outer tub 3 through a drain port 35 of the outer tub 3. The drain valve 11 is provided at the bottom of the housing 2.

[0029] <Control unit> The control unit C is a component that controls the operation of the washing machine 1. The control unit C may include, for example, a memory (not shown) that stores a program and a processing circuit (not shown) that corresponds to a processor such as a CPU, and function as these elements by the processor executing the program.

[0030] Next, components of the automatic feeding unit 6 will be described with reference to Fig. 3 to Fig. 5. Fig. 3 is a perspective view of the automatic feeding unit 6. Fig. 4 is a perspective view of a part of the automatic feeding unit 6. Fig. 5 is a perspective view showing a cross section of the automatic feeding unit 6.

[0031] <Case> 3, the case 61 is a member that houses the tanks 62A, 62B, and 62C that make up the automatic dosing unit 6. The bottom surface 55 of the case 61 has an inclined shape along the outer periphery of the tubular portion 34, which is schematically shown by a dotted line.

[0032] As shown in FIG. 4, to a rear surface 57 of the case 61, liquid agent supply devices 63A, 63B, 63C, a liquid agent discharge flow path 64, a connection flow path 8, and a sensor 90 are connected.

[0033] <Tank> The case 61 accommodates three tanks 62A, 62B, and 62C lined up in the width direction K. The tanks 62A, 62B, and 62C are containers for storing liquid agents used in the washing and rinsing processes. For example, the tank 62A stores a neutral detergent, the tank 62B stores a fabric softener, and the tank 62C stores a detergent. The tanks 62A, 62B, and 62C are detachable from the case 61. The tanks 62A, 62B, and 62C can be removed from the liquid agent dispensers 63A, 63B, and 63C by pulling them toward the front surface 56 and then lifting them out.

[0034] 5, tanks 62A, 62B, and 62C have depths L1, L2, and L3 that increase in order as the distance from the top surface to the deepest part. Here, the deepest parts of tanks 62A, 62B, and 62C are connection parts 76A, 76B, and 76C that connect to solution supply devices 63A, 63B, and 63C, respectively. In this embodiment, the top surfaces of tanks 62A, 62B, and 62C have a common shape, and therefore the volumes of tanks 62A, 62B, and 62C increase in order according to depths L1, L2, and L3.

[0035] Here, tank 62 is a general term for tanks 62A, 62B, and 62C, liquid agent supply device 63 is a general term for liquid agent supply devices 63A, 63B, and 63C, and connection part 76 is a general term for connection parts 76A, 76B, and 76C.

[0036] <Liquid drug supply device> Returning to FIG. 4, the liquid agent supply device 63 is a device that sucks a predetermined amount of liquid agent from the tank 62 and discharges it into the liquid agent discharge flow path 64. The liquid agent supply device 63 is, for example, a volumetric pump. Each liquid agent supply device 63 is connected to a connection part 76 (FIG. 5) of the tank 62 in the front-rear direction M via the rear surface 57 of the case 61. The liquid agent supply devices 63 are lined up in the width direction K and arranged in a stepped manner according to the depth of the tank 62.

[0037] <Liquid discharge flow path> The liquid agent discharge flow path 64 is a flow path member that supplies the liquid agent and water to the outer tank 3 (FIG. 1) through the case 61. The liquid agent discharge flow path 64 is provided on the back surface 57 of the case 61, and is connected to the liquid agent supply device 63. The liquid agent discharge flow path 64 extends from upstream to downstream, inclined downward with respect to the horizontal plane.

[0038] The structure of the tank 62 will be described in detail. Figure 6 is a perspective view of the tank 62 and the liquid agent supply device 63. Figures 7A and 7B are views showing the inside of the tank 62.

[0039] As shown in Fig. 6, the tank 62 includes a main body 87 and a lid 88. The main body 87 is a box-shaped container that forms a front surface 91 and a rear surface 92. The top of the main body 87 is open and is covered with a removable lid 88. The lid 88 further includes a small lid 88A that can be opened and closed.

[0040] 7A and 7B, the main body 87 is indicated by a dotted line. As shown in Figures 7A and 7B, the main body 87 houses the filter member 65 and the float 94, and is provided with a connection portion 76.

[0041] As shown in FIG. 7A, the filter member 65 is disposed above the connection portion 76 in the tank 62 and allows the liquid to pass through in the direction of gravity. When viewed from the flow of the liquid (arrow A), the filter member 65 is provided upstream of the connection portion 76. The filter member 65 has the function of filtering out foreign matter, etc. from the liquid flowing from the tank 62 toward the connection portion 76, thereby preventing the foreign matter, etc. from flowing into the liquid dosing device 63. Examples of foreign matter, etc. include lint, hair, dust, sand, solid particles added to the liquid, etc. Regarding the size of the foreign matter, if the foreign matter is particulate, the diameter of the particle may be, for example, 0.1 mm or more, or may be 0.2 mm or more.

[0042] The filter member 65 is provided in close contact with the inner wall of the tank 62. In this embodiment, the filter member 65 is in close contact with the inner wall that defines the corner of the tank 62 over the entire outer periphery.

[0043] The float 94 is rotatably mounted on the back surface 89 of the lid 88, which faces the bottom surface of the main body 87. The float 94, together with a sensor 90 (FIG. 4) mounted on the back surface 57 of the case 61, is configured to have the function of detecting the remaining amount of liquid agent in the tank 62. The float 94 has buoyancy relative to the liquid agent, and therefore rotates in response to the rise and fall of the liquid level. The sensor 90 detects the position of the float 94 and calculates the liquid level based on the detected information. The sensor 90 is, for example, a proximity sensor that detects the magnetic field generated by the float 94. The control unit C (FIG. 1) of the washing machine 1 calculates the remaining amount of liquid agent contained in the tank 62 from the calculated liquid level.

[0044] The connection part 76 is provided at the deepest part of the back surface 92, and includes a check valve 68 and a connection port 69. The check valve 68 prevents the liquid agent from flowing back from the liquid agent supply device 63. The connection port 69 is an outlet port for the liquid agent.

[0045] Next, the structure of the filter member 65 will be described in detail with reference to Figures 8, 9, 10A, and 10B. Figure 8 is a perspective view of the filter member 65 with the packing 93 removed. Figure 9 is a schematic diagram of one mesh portion 66. Figure 10A is a perspective view of the filter member 65. Figure 10B is a cross-sectional view of the filter member 65 taken along line XX in Figure 10A.

[0046] As shown in Figure 8, the filter member 65 has a mesh portion 66, a frame portion 67, and a packing 93. The mesh portion 66 is a member that has a plurality of through holes 66a that penetrate from the front to the back and allows the liquid agent to pass through. Therefore, the mesh portion 66 exhibits the filtering function of the filter member 65. The frame portion 67 is a member that supports the mesh portion 66 and fixes it to the tank 62. The packing 93 is provided on the outer periphery of the frame portion 67 and is a member that ensures airtightness between the frame portion 67 and the inner wall of the tank 62.

[0047] The mesh portion 66 is a plate-shaped member. In this embodiment, the filter member 65 has four mesh portions 66 formed on the same plane.

[0048] 9, the through holes 66a are arranged on a plane perpendicular to the penetrating direction F1. The through holes 66a may be arranged regularly or randomly. In this embodiment, the through holes 66a are arranged at approximately equal intervals in two directions perpendicular to each other in a plan view.

[0049] The opening size of through hole 66a may be set depending on the specifications, structure, operation, etc. of liquid agent supplying device 63. For example, when liquid agent supplying device 63 is a volumetric pump, through hole 66a may be a rectangle with each side measuring 50 μm or more and 200 μm or less in plan view. In through hole 66a, for example, a pair of sides may have lengths of 0.18 mm and a pair of sides may have lengths of 0.27 mm. In through hole 66a, for example, a pair of sides may have lengths of 0.17 mm and a pair of sides may have lengths of 0.09 mm. Such a structure can promote the passage of a liquid agent having a viscosity of 5000 mPa·s or less while suppressing the passage of foreign matter.

[0050] Returning to Figure 8, the frame portion 67 has a frame portion 81, a wall portion 82, and a flat portion 83. The frame portion 81 is connected to the outer periphery of the mesh portion 66 and maintains the shape of the mesh portion 66 and its arrangement relative to the frame portion 67. The wall portion 82 extends from the upper and lateral sides of the frame portion 81 along the side of the tank 62 (e.g., upward). The flat portion 83 extends from the bottom side of the frame portion 81 along the bottom surface of the tank 62.

[0051] The wall portion 82 extends to the height of a tank protrusion 62b (FIG. 11) provided on the tank 62. The flat portion 83 extends to the position of a tank recess 62c (FIG. 11) provided on the tank 62. As shown in FIG. 10A, the wall portion 82 is formed with a recess 82a that is recessed toward the front side M1, and the flat portion 83 is formed with a protrusion 83a that protrudes downward. The recess 82a engages with the tank protrusion 62b, and the protrusion 83a engages with the tank recess 62c, thereby fixing the filter member 65 to the tank 62.

[0052] 10A and 10B, the frame portion 67 further has a groove 67a formed therein. The groove 67a is formed continuously around the outer periphery of the wall portion 82 and the flat portion 83.

[0053] As shown in FIG. 10B, the packing 93 is provided in the groove 67a and fixed to the filter member 65.

[0054] The mesh portion 66 and the frame portion 67 may be formed as separate members. For example, the frame portion 67 may be formed by injection molding, and the mesh portion 66 may be insert molded into the molded frame portion 67. Furthermore, the mesh portion 66 and the frame portion 67 may be separable.

[0055] 10B, the mesh portion 66 and the frame portion 67 may have different thicknesses. The thickness of the mesh portion 66 may be smaller than the thickness of the frame portion 81. Here, the thickness of the mesh portion 66 means the maximum distance between the front and back surfaces perpendicular to the penetration direction F1 in which the through holes 66a extend.

[0056] Next, the arrangement of the filter member 65 in the tank 62 will be described in detail with reference to Fig. 11. Fig. 11 is a cross-sectional view of the tank 62.

[0057] As shown in FIG. 11, when the float 94 is at its lowest point, the filter member 65 is provided with a gap between it and the float 94 .

[0058] Furthermore, the mesh portion 66 is disposed at an incline downward toward the front side M1 with respect to the bottom surface 60 of the tank 62. Furthermore, the mesh portion 66 is disposed at an incline downward toward the front side M1 with respect to the liquid level S (horizontal plane) of the liquid agent. For example, the angle φ of the mesh portion 66 with respect to the horizontal is 3° or more and 45° or less, and preferably 15° or more and 45° or less. In this embodiment, the angle θ of the bottom surface 60 with respect to the horizontal is 7°, and the angle φ of the mesh portion 66 is 22°.

[0059] Here, the positional relationship between the filter member 65 and the liquid surface S will be described in more detail.

[0060] First, when the liquid agent contained in the tank 62 is used, the liquid level height H of the liquid level S decreases. Furthermore, when the user refills the tank 62 with the liquid agent, the liquid level height H rises. Here, the liquid level height H means the vertical distance from a certain position on the bottom surface 60 of the tank 62 to the liquid level S. In this embodiment, the periphery of the filter member 65 is shown as an example of the position on the bottom surface 60, but is not limited to this.

[0061] While the liquid level height H fluctuates, the apex P2 of the mesh portion 66 is set to a predetermined liquid level height H or less.

[0062] Here, vertex P2 of mesh portion 66 is the portion of mesh portion 66 that defines the uppermost through-hole 66a. In other words, vertex P2 is the portion of mesh portion 66 that is the shortest distance from the liquid level S when tank 62 is filled with the liquid agent. In this embodiment, since mesh portion 66 is an inclined plate-like member, vertex P2 is the portion of mesh portion 66 that is adjacent to the back surface 92 of tank 62. Since vertex P2 is equal to or lower than the predetermined liquid level height H, the entire mesh portion 66 is lower than the predetermined liquid level height H.

[0063] Furthermore, the predetermined liquid level height H is the height of the liquid level S of the liquid agent that is set in advance according to the structure or volume of the tank 62. In the first embodiment, the predetermined liquid level height H may be the liquid level height H at the time when the liquid agent contained in the tank 62 becomes low, that is, according to the "low remaining amount" state.

[0064] "Low amount remaining" corresponds, for example, to the amount of liquid agent remaining when the volume of the liquid agent is 20% or less of the volume of the tank 62. Also, "low amount remaining" corresponds, for example, to the amount of liquid agent used in one to five washing operations. In this case, the amount of liquid agent used in a washing operation depends on the washing course being performed, and therefore may be an average or maximum value taking into account the type of washing course.

[0065] The predetermined liquid level H corresponds to the liquid level H corresponding to the timing at which a "low remaining amount" notification or display is given to the user. When a "low remaining amount" notification or display is given, the user is prompted to refill the liquid. Therefore, the predetermined liquid level H in the first embodiment corresponds to the refill liquid level H1 corresponding to the timing at which the tank 62 is refilled with the liquid.

[0066] Furthermore, when a user who has received the "low remaining amount" message refills the liquid agent in the tank 62, the liquid level H becomes equal to or higher than the refill liquid level H1. Therefore, the refill liquid level H1 is the lowest liquid level H expected when the washing machine 1 is used immediately before refilling.

[0067] The liquid level height H may be directly detected by, for example, a liquid level sensor. Alternatively, the liquid level height H may be indirectly calculated based on other parameters related to the liquid level height H. In the first embodiment, a magnetic field that changes depending on the distance between the float 94 and the sensor 90 will be described as an example of the other parameters.

[0068] The liquid level height H is calculated indirectly based on the voltage value that changes with the rotation of the float 94. Detection of the liquid level height H by the float 94 will be described in more detail with reference to Figures 11 and 12. Figure 12 is an enlarged cross-sectional view of the tank 62.

[0069] As shown in FIG. 11 , the float 94 has a first arm 95, a second arm 97, a float portion 98, and a magnet storage portion 96. The first arm 95 is a rod-shaped member rotatably attached to the lid 88 around a rotation axis V2. The second arm 97 is connected to the first arm 95 in a bent state relative to the first arm 95. The float portion 98 is provided on the second arm 97 and is a member that has buoyancy with respect to the liquid agent. The magnet storage portion 96 is formed on the first arm 95 and extends in a direction perpendicular to the first arm 95. The magnet storage portion 96 stores a magnet 99 that is detected by the sensor 90.

[0070] 12, the magnet 99 has a first magnetic pole 99A and a second magnetic pole 99B, and the magnetic poles 99A and 99B generate a magnetic field that is detected by the sensor 90. The sensor 90 includes a Hall IC that detects magnetic flux density, and outputs a voltage value that corresponds to the magnitude of the magnetic flux density passing through the Hall IC.

[0071] As the float portion 98 (FIG. 11) moves up and down together with the liquid level S, the first arm 95 and the second arm 97 rotate integrally in accordance with the movement of the float portion 98, and the distance D between the sensor 90 and the magnet 99 changes. The change in distance D causes a change in the voltage value output from the sensor 90; specifically, as the distance D decreases, the voltage value decreases. Using this relationship, the liquid level height H can be indirectly calculated based on the voltage value.

[0072] As the washing process is performed, the liquid in the tank 62 is used, and the liquid level S and the float portion 98 gradually approach the bottom surface 60 of the tank 62. As the float portion 98 descends, the float 94 rotates, and the magnet 99 approaches the sensor 90, reducing the distance D and increasing the magnetic flux density detected by the sensor 90. As a result, the voltage value output from the sensor 90 decreases, and a decrease in the liquid level height H is calculated.

[0073] When the amount of liquid agent in the tank 62 is sufficiently reduced, the replenishment liquid level H1 is calculated.

[0074] In the first embodiment, when the replenishment liquid level height H1 is calculated, the control unit C notifies the user that the liquid level is low and that replenishment of the liquid is necessary. Examples of notification methods include displaying text or a diagram on a display provided on the washing machine 1, playing a sound through a speaker, or sending a notification via a smartphone application.

[0075] The user can remove the lid 88 or open the small lid 88A to add the liquid agent to the tank 62. By this operation, the liquid level S becomes equal to or higher than the replenishment liquid level height H1.

[0076] 13A to 13D, the relationship between the liquid level S and the apex P2 of the mesh portion 66 will be described in more detail.

[0077] 13A, when the liquid level S is higher than the apex P2, the mesh portion 66 is buried in the liquid agent. In other words, the mesh portion 66 is not exposed to the air.

[0078] By the operation of liquid agent supply device 63 (FIG. 6), the liquid agent is sucked out of tank 62 and discharged toward outer tank 3 (arrow W1). To replenish the amount sucked out, the liquid agent passes through mesh portion 66 (arrow W2).

[0079] 13B, when the liquid level height H becomes equal to or lower than the apex P2, the upper part of the mesh portion 66 is exposed to the air, and the air passes through the exposed part of the mesh portion 66 and flows into the space X1 downstream of the mesh portion 66 (arrow R1).

[0080] When the liquid agent is discharged in this state, as shown in Figure 13C, the liquid agent is sucked out of tank 62 (arrow W1), and the amount of liquid agent in space X1 decreases. Then, air flows further into the empty space in space X1 (arrow R1). Therefore, a difference occurs in the liquid level height H between the upstream and downstream of mesh portion 66.

[0081] As the liquid agent is further discharged, the remaining amount of the liquid agent in the space X1 becomes small or no liquid agent remains, as shown in FIG. 13D. Therefore, air tends to flow from the space X1 through the connection port 69 into the liquid agent supply device 63 (FIG. 6) (arrow R2). In other words, a communicating air passage is likely to be established through the space X1 from the upstream of the mesh portion 66 to the liquid agent supply device 63. In this state, even though the liquid agent remains in the tank 62 upstream of the mesh portion 66, air may be sucked out of the tank 62 instead of the liquid agent and supplied to the outer tank 3.

[0082] In the present disclosure, when the liquid level S drops to the replenishment liquid level height H1, the user is prompted to replenish the liquid. Therefore, once the liquid is replenished, the liquid level S is maintained at or above the replenishment liquid level height H1. Because the apex P2 is set to be below the replenishment liquid level height H1, it becomes easier to maintain the mesh portion 66 buried in the liquid.

[0083] Next, the state shown in FIG. 13C will be described in more detail. The difference in liquid level height H is due to the difference in viscosity between air and the liquid. Generally, the viscosity of air is lower than that of the liquid. Furthermore, when the fluid passes through the mesh portion 66, a pressure loss occurs, and the magnitude of the pressure loss depends on the viscosity of the fluid. Specifically, the pressure loss of the air is smaller than the pressure loss of the liquid. Therefore, the air passes through the mesh portion 66 preferentially over the liquid, resulting in the difference in liquid level height H.

[0084] 14A to 14D, the effect of the inclination of the mesh portion 66 will be described in more detail. Figures 14A and 14B are enlarged cross-sectional views of the tank 62. Figures 14C and 14D are enlarged cross-sectional views of the mesh portions 66, 106.

[0085] When the liquid agent is poured into an empty tank 62, a plurality of bubbles 101 may be formed downstream of the mesh portions 66, 106, as shown in FIGS. 14A and 14B.

[0086] 14A, when the mesh portion 66 is provided at an angle relative to the liquid surface S, multiple bubbles 101 gather at the vertex P2 of the mesh portion 66 (arrow B1) to form one large bubble 102. The large bubble 102 is less susceptible to downward resistance due to viscous resistance and surface tension than the small bubbles 101. Therefore, the bubble 102 is more likely to escape above the mesh portion 66 (arrow B2).

[0087] 14B, when a horizontal mesh portion 106 is provided in the tank 62, the plurality of bubbles 101 are dispersed throughout the entire mesh portion 106. The dispersed small bubbles 101 are susceptible to downward resistance, and the bubbles are difficult to escape from below the mesh portion 106.

[0088] The liquid agent passing through the openings of the mesh portions 66, 106 can be considered as a fluid flowing through the capillary portions. The openings of the mesh portions 66, 106 are defined by the wall portions 66b, 106b, and the liquid agent passing through the mesh portions 66, 106 is subjected to a resistance force, i.e., capillary force, from the wall portions 66b, 106b in the direction opposite to the flow direction. The capillary force increases with the length of the wall portions 66b, 106b in the direction of gravity.

[0089] 14C and 14D, when the thickness of mesh portions 66, 106 is constant, length L4 of wall portion 66b along the direction of gravity is shorter than length L5 of wall portion 106b along the direction of gravity. Therefore, the resistance force that the liquid receives from mesh portion 66 is smaller than the resistance force that the liquid receives from mesh portion 106. Therefore, it is easier for the liquid to pass through mesh portion 66 than through mesh portion 106.

[0090] As described above, by arranging mesh portion 66 at an angle, it becomes easier for air bubbles 101 to escape and for the liquid agent to pass through. Therefore, the downstream of mesh portion 66 is filled with the liquid agent, and a more stable amount of the liquid agent can be sucked out from tank 62.

[0091] The above explanation uses tank 62C as a representative of tank 62. However, as shown in Figures 15A and 15B, tanks 62A and 62B have different depths relative to tank 62C, and therefore the respective replenishment liquid levels may differ. Figure 15A is a schematic cross-sectional view of tank 62A, and Figure 15B is a schematic cross-sectional view of tank 62B.

[0092] For example, the tanks 62A and 62B may have replenishment liquid level heights H21 and H22, respectively, which are different from the replenishment liquid level height H1. In this embodiment, the apex P2 of the mesh portion 66 is set to be equal to or lower than the smallest replenishment liquid level height H21 among the replenishment liquid level heights H1, H21, and H22. This allows the tanks 62A, 62B, and 62C to use the same filter member 65.

[0093] The above explanations are summarized to describe the features of the present disclosure.

[0094] The washing machine 1 according to this embodiment has a mesh portion 66, and the apex P2 of the mesh portion 66 is set to be equal to or lower than the replenishment liquid level H1.

[0095] Because apex P2 is lower than replenishment liquid level height H1, mesh portion 66 can be more easily kept submerged in the liquid by appropriate replenishment. When mesh portion 66 is submerged in the liquid, air is less likely to pass through mesh portion 66 and flow into downstream space X1. This prevents a difference in liquid level height H from forming between the upstream and downstream of mesh portion 66, reduces the amount of liquid in space X1, and prevents air from flowing into liquid agent dosing device 63 through space X1. This prevents air from being sucked into liquid agent dosing device 63, allowing the liquid agent to be stably dispensed into outer tub 3 and washing tub 4.

[0096] It also prevents a user from mistakenly realizing that liquid remains in the tank 62 upstream of the mesh section 66 but that the liquid has not been poured into the outer tank 3, which would lead to a malfunction of the sensor 90 or the like.

[0097] [effect] The washing machine 1 according to the first embodiment can achieve the following effects.

[0098] As described above, washing machine 1 of this embodiment includes washing tub 4, tank 62 (first tank), liquid agent dispenser 63 (first automatic liquid agent dispenser), and mesh portion 66 (first mesh portion). Washing tub 4 is rotatably provided within housing 2. Tank 62 contains the liquid agent to be supplied to washing tub 4. Liquid agent dispenser 63 is connected to connection portion 76 (first connection portion) provided on tank 62. Mesh portion 66 is provided inside tank 62 and is disposed upstream of connection portion 76, inclined with respect to bottom surface 60 of tank 62, and has a plurality of through-holes 66a. An apex P2 of mesh portion 66 is set to a predetermined height or less.

[0099] With this configuration, apex P2 of mesh portion 66 is set to a predetermined height or less, making it easier to maintain mesh portion 66 covered with the liquid agent. This makes it difficult for a difference in liquid level height H to form between the upstream and downstream of mesh portion 66. This prevents air from being sucked into liquid agent dispenser 63, allowing the liquid agent to be stably dispensed into outer tub 3 and washing tub 4.

[0100] Furthermore, in the washing machine 1 of this embodiment, the tank 62 is provided with a float 94 (first float) that has buoyancy with respect to the liquid agent, and a sensor 90 (first sensor) that detects the float 94. When the float 94 is positioned at a replenishment liquid level height H1 (first replenishment liquid level height), the sensor 90 notifies the timing of refilling the tank 62 with the liquid agent. An apex P2 of the mesh portion 66 is set to be equal to or lower than the replenishment liquid level height H1.

[0101] With this configuration, mesh portion 66 can be easily kept covered with the liquid by appropriate refilling. This prevents air from being drawn into liquid dosing device 63, allowing the liquid to be more stably dispensed into outer tank 3.

[0102] Moreover, the washing machine 1 of this embodiment further includes a frame portion 67 that supports the mesh portion 66.

[0103] This configuration allows the arrangement of the apex P2 of the mesh portion 66 in the tank 62 to be maintained. Furthermore, the inclination of the mesh portion 66 can be changed as needed by changing the structure of the frame portion 67. This improves the design freedom of the filter member 65.

[0104] In addition, in the washing machine 1 of this embodiment, the frame portion 67 has a flat portion 83 along the bottom surface 60 of the tank 62.

[0105] With this configuration, it becomes easy to increase the inclination of the mesh portion 66 while lowering the apex P2 of the mesh portion 66.

[0106] In addition, in the washing machine 1 of this embodiment, the mesh portion 66 and the frame portion 67 are formed separately.

[0107] This configuration allows the mesh portion 66 and the frame portion 67 to be formed using different processes or materials, improving the design flexibility of the filter member 65. For example, the mesh portion 66 can be formed by insert molding into a pre-formed frame portion 67. A material that is easy to form a fine mesh into for the mesh portion 66 can be selected, while a high-strength material can be selected for the frame portion 67. This type of processing allows the strength of the filter member 65 to be maintained while further inhibiting the passage of foreign matter.

[0108] In addition, in the washing machine 1 of this embodiment, the thickness of the mesh portion 66 is smaller than the thickness of the frame portion 67.

[0109] With this configuration, the opening size of the mesh portion 66 can be made small, while suppressing an increase in pressure loss compared to when the thickness of the mesh portion 66 is greater than the thickness of the frame portion 67.

[0110] The washing machine 1 of this embodiment also includes a tank 62B (second tank) that contains the liquid agent to be supplied to the washing tub 4 and has a depth different from that of the tank 62C (first tank). The washing machine 1 also includes a liquid agent dispenser 63B (second automatic liquid agent dispenser) that is connected to a connection portion 76B (second connection portion) provided on the tank 62B. The washing machine 1 also includes a mesh portion 66 (second mesh portion) that is provided inside the tank 62B, is disposed upstream of the connection portion 76B, and is inclined with respect to the bottom surface of the tank 62B, and has through-holes 66a. The tank 62B also includes a float 94 (second float) that is buoyant with respect to the liquid agent, and a sensor 90 (second sensor) that detects the position of the float 94. The sensor 90 notifies the user of the timing to refill the tank 62B with the liquid agent when the float 94 is positioned at a refill liquid level H22 (second refill liquid level) that is different from the refill liquid level H1. The apex P2 of the mesh portion 66 is equal to or lower than the replenishment liquid level H22.

[0111] With this configuration, even when washing machine 1 has multiple tanks 62, appropriate replenishment makes it easier to maintain mesh portion 66 covered with the liquid agent. This prevents air from being sucked into multiple liquid agent dosing devices 63, and allows the liquid agent to be stably dispensed from multiple tanks 62 into outer tub 3.

[0112] In addition, in the washing machine 1 of this embodiment, the mesh portion 66 of each of the tanks 62B and 62C is common to both tanks.

[0113] With this configuration, the manufacturing cost of the washing machine 1 can be reduced.

[0114] In this embodiment, the mesh portion 66 is described as a plate-like member, but is not limited to this. For example, the mesh portion 66 may be formed along a curved surface such as a concave surface or a convex surface.

[0115] In the present embodiment, the mesh portion 66 is described as being disposed so as to be inclined downward toward the front side M1 relative to the bottom surface 60 of the tank 62, but this is not limiting. For example, the mesh portion 66 may be inclined downward toward the rear side M2 ​​relative to the bottom surface 60.

[0116] In this embodiment, the apex P2 of the mesh portion 66 is set lower than the smallest replenishment liquid level H21 among the replenishment liquid level levels H1, H21, and H22, but this is not limited to this. For example, the shape of the mesh portion 66 or the height of the apex P2 may be changed according to the replenishment liquid level levels H1, H21, and H22 of the tanks 62A, 62B, and 62C, respectively. Furthermore, at least two of the replenishment liquid level levels H1, H21, and H22 may be equal to each other.

[0117] In the present embodiment, it has been described that the voltage value output from the sensor 90 decreases as the distance D between the sensor 90 and the magnet 99 decreases, but this is not limiting. For example, the first magnetic pole 99A and the second magnetic pole 99B may be interchanged and the magnet 99 may be arranged in the opposite direction so that the voltage value increases as the distance D decreases.

[0118] In the present embodiment, an example has been described in which the predetermined liquid level H corresponds to the replenishment liquid level H1 according to the timing of replenishing the liquid agent in the tank 62, but the present invention is not limited to this. For example, as shown in Modification 1 described below, the predetermined liquid level H may be the float lift-up water level in each of the tanks 62A, 62B, and 62C.

[0119] [Variation 1] 16 is a graph showing the relationship between the remaining amount of liquid agent in each of the tanks 62A, 62B, and 62C according to Modification 1 ("remaining amount of liquid agent") and the output value of the voltage output by the sensor 90 ("sensor output value"). The horizontal axis represents the remaining amount of liquid agent, and the vertical axis represents the sensor output value.

[0120] 16, remaining amount transition lines L11, L12, and L13 start from starting points S1, S2, and S3, respectively. Because the tanks 62C, 62B, and 62A have larger capacities in this order, the starting points S1, S2, and S3 of the corresponding remaining amount transition lines L11, L12, and L13 are located on the left side of the page in this order (largest remaining amount).

[0121] As described above, when the remaining amount of liquid decreases due to the operation of the liquid agent supply device 63, the magnet 99 approaches the sensor 90 and the sensor output value decreases (decreases monotonically). As the remaining amount of liquid decreases, the float 94 reaches the lowest point (lower limit point) and the movement of the magnet 99 stops. Although the remaining amount of liquid continues to decrease as the liquid agent supply device 63 is operated, the distance between the magnet 99 and the sensor 90 does not change, and the sensor output value remains constant.

[0122] As shown in FIG. 16, the points at which the float 94 reaches the lowest point and stops are float stop water levels E1, E2, and E3.

[0123] The control unit C determines whether the float stop water levels E1 to E3 have been reached based on the "rate of change" of the sensor output value. Specifically, the control unit C determines whether the rate of change is smaller than a predetermined threshold, and if it determines that the rate of change is smaller than threshold A1, it detects that the float stop water levels E1, E2, and E3 have been reached. If the amount of liquid remaining in the tank 62 when the float 94 reaches its lowest point is known in advance, it becomes possible to estimate the remaining amount of liquid with high accuracy by detecting that the float stop water levels E1 to E3 have been reached.

[0124] When the control unit C detects that the float stop water levels E1 to E3 have been reached, it starts counting the amount of liquid agent discharged. For example, it starts counting the driving time of the liquid agent dosing device 63 as a parameter representing the amount of liquid agent discharged.

[0125] When the count relating to the amount of liquid medicine ejected reaches a predetermined count number, the control unit C causes the display unit 84 to display "Low amount remaining" (low amount remaining display line), indicating that the amount of liquid medicine remaining is low.

[0126] In Figure 16, the area to the left of the low level indicator line is divided into multiple areas. Each area behaves differently when it detects that the float stop water level E1, E2, or E3 has been reached.

[0127] The area where the sensor output value is lower than threshold A2 is the "count start area." In the count start area, counting of the amount of liquid dispensed begins when it is detected that the float stop water level E1, E2, or E3 has been reached. Furthermore, since the float rises from the float stop water level E1, E2, or E3 when the tank 62 is refilled with liquid, the float stop water level E1, E2, or E3 in the count start area can be defined as the float rising water level.

[0128] The area where the sensor output value is higher than threshold A2 and lower than threshold A3 is the “abnormality detection area.” In the abnormality detection area, when it is detected that the float stop water level E1, E2, or E3 has been reached, the amount of liquid dispensed is not counted, and an error is issued indicating that the state of float 94 is abnormal.

[0129] An area where the sensor output value is higher than the threshold A3 is a “non-determination area.” In the non-determination area, no abnormality detection is performed.

[0130] In Modification 1, the apex P2 of the mesh portion 66 is set below the float stop water levels E1, E2, and E3. This configuration prevents the mesh portion 66 from affecting the water level in the "abnormality detection area." Specifically, it prevents a decrease in discharge rate due to air inflow into the "abnormality detection area," preventing erroneous abnormality detection. Therefore, it is possible to accurately notify the user of abnormalities such as pump failure or stuck float.

[0131] (Embodiment 2) A washing machine 251 according to a second embodiment of the present disclosure will be described. In the second embodiment, differences from the first embodiment will be mainly described, and descriptions that overlap with the first embodiment will be omitted. In the second embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals.

[0132] 17A and 17B are schematic diagrams of a washing machine 251 according to a second embodiment of the present disclosure. As shown in FIGS. 17A and 17B, the washing machine 251 has an automatic dosing unit 206.

[0133] The second embodiment differs from the first embodiment in the structure of the tank 271 included in the automatic feeding unit 206. More specifically, inside the tank 271, the filter member 265 is disposed below the check valve 268.

[0134] 18A and 18B are perspective views of tank 271. As shown in Fig. 18A and 18B, tank 271 is a box-shaped container and includes a main body 287 having a front surface 291 and a rear surface 292. The top of main body 287 is covered with a lid 288.

[0135] As shown in FIG. 18A, a remaining amount display window 293 made of a transparent material is provided on the front surface 291. Vertically aligned scale lines 294 are printed on the remaining amount display window 293. A minimum scale line 294A indicates the timing for refilling. The user can see the liquid level of the liquid agent in the tank 271 through the remaining amount display window 293, and can check the remaining amount of the liquid agent by comparing it with the scale line 294. Instead of the scale line 294 consisting of multiple lines, only a refill mark indicating the liquid level to be refilled may be provided.

[0136] 18B, a pump 273 for sucking out the liquid agent is provided on the rear surface 292. The pump 273 is connected to a discharge port 278 provided on the rear surface 292, and sucks out the liquid agent in the tank 271 through the discharge port 278. The pump 273 is a volumetric pump, and supplies a predetermined volume of the liquid agent to the washing tub 4.

[0137] 19A to 19C are diagrams showing the internal structure of tank 271. As shown in Fig. 19A to 19C, filter member 265 and elbow member 276 are housed in main body 287. As shown in Fig. 19B, the liquid agent housed in tank 271 passes through filter member 265 and flows into pump 273 via elbow member 276 (see arrow A).

[0138] 19B and 19C, the filter member 265 is disposed along the inner bottom surface 272 of the tank 271. The filter member 265 divides the space of the tank 271 into an upper space 201 and a lower space 202 that includes the inner bottom surface 272 of the tank 271. The volume of the upper space 201 is larger than the volume of the lower space 202, and in the second embodiment, is 30 times or more the volume of the lower space 202.

[0139] The filter member 265 has a function of filtering foreign matter from the liquid agent flowing from the upper space 201 into the lower space 202 (see arrow A).

[0140] An elbow member 276 is provided above the filter member 265 to allow the liquid agent to flow from the lower space 202 into the pump 273 .

[0141] As shown in FIG. 19B , the elbow member 276 is a pipe member extending between an inlet 277 for sucking the liquid agent from the lower space 202 and an outlet 278 connected to the pump 273. The elbow member 276 may also be referred to as a suction pipe portion. The elbow member 276 forms a flow path therein through which the liquid agent passes. By the operation of the pump 273, the liquid agent flows through the flow path from the inlet 277 toward the outlet 278.

[0142] The elbow member 276 has a first portion 276A extending diagonally upward from the suction port 277 and a second portion 276B extending laterally toward the pump 273. The first portion 276A and the second portion 276B are connected to each other and form a bend. The end of the first portion 276A forms the suction port 277 and penetrates the filter member 265. The end of the second portion 276B forms the discharge port 278 and penetrates the back surface 292 of the tank 271. Because the elbow member 276 is bent from the inner bottom surface of the tank 271 toward the side surface (back surface 292), it has a bulky shape.

[0143] The second portion 276B has a built-in check valve 268. The check valve 268 can prevent the liquid agent from flowing back from the pump 273 to the tank 271.

[0144] FIG. 20 is a cross-sectional view of a portion of the tank 271 showing the arrangement of the filter member 265. As shown in FIG. 20, the filter member 265 is inclined with respect to the horizontal inner bottom surface 272. The filter member 265 is inclined downward from the rear surface 292 to the front surface 291. As a result, a first side 281A of the filter member 265 along the front surface 291 is in contact with the inner bottom surface 272, and a second side 281B of the filter member 265 opposite the first side 281A is in contact with the rear surface 292 at a position higher than the first side 281A. In other words, the apex of the filter member 265 (and the apex P21 of the mesh portion 266 described below) is located near the rear surface 292. In the second embodiment, the apex of the filter member 265 is lower than the minimum scale 294A.

[0145] Since the filter member 265 is inclined downward toward the front surface 291, the liquid level visible through the remaining amount display window 293 (FIG. 3) provided on the front surface 291 can be prevented from being obscured by the filter member 265.

[0146] The inclination angle θ2 of the filter member 265 is, for example, 15° or less, and preferably 2° to 5°.

[0147] The suction port 277 is aligned with the lower surface of the inclined filter member 265. In other words, the suction port 277 does not protrude into the lower space 202, but is located on the same plane as the lower surface of the filter member 265. On the other hand, the suction port 277 may protrude downward from the lower surface of the inclined filter member 265.

[0148] A flange portion 295 is provided on the outer periphery of the end portion of first portion 276A that forms suction port 277. The lower surface of flange portion 295 faces the upper surface of filter member 265 and presses filter member 265 against inner bottom surface 272 of tank 271. In addition, because first portion 276A extends obliquely downward, first portion 276A urges filter member 265 downward and toward front surface 291.

[0149] 21 is a perspective view of the filter member 265. As shown in FIG. 21, the filter member 265 has a mesh portion 266 and a frame portion 267. The mesh portion 266 and the frame portion 267 correspond to the mesh portion 66 and the frame portion 67 in the first embodiment, respectively. An opening 284 is formed in the frame portion 267, and the filter member 265 is formed by insert-molding the mesh portion 266 into the opening 284. In addition to the opening 284 for providing the mesh portion 266, the frame portion 267 has a connection opening 285 to which an elbow member 276 is connected. The connection opening 285 connects the elbow member 276 to the lower space 202, allowing the pump 273 to suck out the liquid agent in the lower space 202.

[0150] A user puts the liquid into the tank 271. When the liquid is used in the washing process, the height of the liquid surface S21 in the tank 271 gradually decreases.

[0151] In the present disclosure, when the liquid level S21 drops to the minimum scale line 294A, the user is prompted to refill the liquid. Therefore, when the liquid is refilled, the liquid level S21 is maintained at or above the minimum scale line 294A. Because the apex P21 of the mesh portion 266 is set to be below the minimum scale line 294A, it becomes easier to maintain the mesh portion 266 buried in the liquid.

[0152] In washing machine 251 according to embodiment 2, elbow member 276 is disposed above filter member 265. Since there is no longer any constraint in lower space 202, such as accommodating outlet 278 of elbow member 276, filter member 265 can be disposed at a lower position in tank 271. This allows filter member 265 to remain covered with the liquid agent for a longer period of time. This reduces the space for air to enter lower space 202, preventing pump 273 from sucking air out of tank 271 instead of liquid agent. This allows for a stable supply of liquid agent to washing tub 4.

[0153] [effect] The washing machine 1 according to the second embodiment can achieve the following effects.

[0154] As described above, in washing machine 251 of the present embodiment, minimum scale line 294A (liquid agent refill line) corresponding to the timing of refilling the liquid agent is provided in (first tank). Vertex P21 of (first mesh portion) is set to be equal to or lower than the height of minimum scale line 294A.

[0155] With this configuration, by appropriately replenishing the liquid, it becomes easier to maintain the state in which mesh portion 266 is covered with the liquid. Therefore, it is possible to prevent air from being sucked into pump 273, and to more stably dispense the liquid into washing tub 4.

[0156] The washing machine in the first aspect comprises a washing tub rotatably mounted within a housing, a first tank for storing a liquid agent to be supplied to the washing tub, a first automatic liquid agent dispenser connected to a first connection part mounted on the first tank, and a first mesh part provided inside the first tank, positioned upstream of the first connection part and inclined with respect to the bottom surface of the first tank, and having a plurality of through holes, the apex of the first mesh part being set to a predetermined height or below.

[0157] As a washing machine in a second aspect, in the washing machine in the first aspect, a liquid agent refill line is provided in the first tank according to the timing of refilling the liquid agent, and the predetermined height is the height of the liquid agent refill line.

[0158] As a third aspect of the washing machine, in the washing machine of the first aspect, the first tank is provided with a first float that has buoyancy relative to the liquid agent and a first sensor that detects the first float, and when the first float is positioned at a first replenishment liquid level height, the first sensor notifies the timing of refilling the first tank with the liquid agent, and the predetermined height is the first replenishment liquid level height.

[0159] As a washing machine in a fourth aspect, in the washing machine in the first or third aspect, the first tank is provided with a float having buoyancy with respect to the liquid agent and a magnetic body, and a magnetic sensor that detects the magnetism of the magnetic body, and the predetermined height is the height of the liquid surface when the rate of change of the output value of the magnetic sensor is smaller than a threshold value.

[0160] A fifth aspect of the washing machine is the washing machine of any one of the first to fourth aspects, further comprising a frame portion that supports the first mesh portion.

[0161] A sixth aspect of the invention relates to the washing machine of the fifth aspect, wherein the frame portion has a flat portion that fits along the bottom surface of the first tank.

[0162] A seventh aspect of the washing machine is the washing machine according to the fifth or sixth aspect, wherein the first mesh portion and the frame portion are formed separately.

[0163] In an eighth aspect of the washing machine, in the washing machine of any one of the fifth to seventh aspects, the thickness of the first mesh portion is smaller than the thickness of the frame portion.

[0164] A ninth aspect of the washing machine is the washing machine of the third aspect, further comprising: a second tank that stores the liquid agent to be supplied to the washing tub and has a depth different from that of the first tank; a second automatic liquid agent dispenser that is connected to a second connection part that is provided on the second tank; and a second mesh part that is provided inside the second tank and is arranged upstream of the second connection part and is inclined with respect to the bottom surface of the second tank and has through holes. The second tank is provided with a second float that has buoyancy with respect to the liquid agent and a second sensor that detects the position of the second float, and when the second float is positioned at a second replenishment liquid level that is different from the first replenishment liquid level, the second sensor notifies the timing of refilling the second tank with the liquid agent, and the apex of the second mesh part is below the second replenishment liquid level.

[0165] A washing machine according to a tenth aspect is the washing machine according to the ninth aspect, in which the first mesh portion and the second mesh portion are common to each other.

[0166] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart therefrom. [Industrial Applicability]

[0167] The washing machine of the present disclosure can improve the functionality of the configuration related to liquid agent dispensing, and is therefore useful as a domestic washing machine, a commercial washing machine, or any type of washer-dryer (e.g., a domestic drum washing machine or a vertical washing machine). [Explanation of symbols]

[0168] 1 washing machine 2. Case 3 Outer tank 4 Washing machine 5 Drive unit 6 Automatic feeding unit 8 Connecting Channels 10 Water inlet 11 Drain valve 61 cases 62 Tank 63 Liquid injection device 64 Liquid discharge flow path 65 Filter material 66 Mesh section 67 Frame section 68 Check valve 76 Connection 87 Main Unit 88 Lid 90 Sensors 94 Float 95 First Arm 96 Magnet storage section 97 Second Arm 98 Float 99 Magnet K Width direction M Anteroposterior direction H Liquid level H1 Refill liquid level P2 Vertex

Claims

1. A washing tub rotatably provided in a housing; A first tank that contains a liquid agent to be supplied to the washing tub; a first automatic liquid agent dispenser connected to a first connection portion provided on the first tank; a first mesh portion provided inside the first tank, disposed upstream of the first connection portion and inclined with respect to a bottom surface of the first tank, and having a plurality of through holes; Equipped with the vertices of the first mesh portion are set to a predetermined height or less, The first tank is provided with a float having a floating portion that is buoyant with respect to the liquid agent and a magnetic body that is spaced apart from the floating portion, Further, a magnetic sensor is provided to detect the magnetism of the magnetic body. The floating portion descends to a lower limit point, When the floating portion reaches the lower limit, the rate of change of the output value of the magnetic sensor becomes smaller than the threshold value, The predetermined height is a height of a liquid surface passing through a part of the floating portion at the lower limit point, The first mesh portion has an angle of 45° or less with respect to the horizontal.

2. The washing machine according to claim 1 , further comprising a frame portion supporting the first mesh portion.

3. The washing machine according to claim 2 , wherein the frame portion has a flat portion that conforms to a bottom surface of the first tank.

4. The washing machine according to claim 2 , wherein the first mesh portion and the frame portion are formed separately.

5. The washing machine according to claim 2 , wherein the thickness of the first mesh portion is smaller than the thickness of the frame portion.

6. A washing tub rotatably provided in a housing; A first tank that contains a liquid agent to be supplied to the washing tub; a first automatic liquid agent dispenser connected to a first connection portion provided on the first tank; a first mesh portion provided inside the first tank, disposed upstream of the first connection portion and inclined with respect to a bottom surface of the first tank, and having a plurality of through holes; Equipped with the vertices of the first mesh portion are set to a predetermined height or less, The first tank is provided with a first float having buoyancy with respect to the liquid agent, Further provided is a first sensor for detecting the first float, the first sensor notifies the timing of refilling the first tank with the liquid agent when the first float is positioned at a first refill liquid level; the predetermined height is the first replenishment liquid level height, the first mesh portion has an angle of 45° or less with respect to the horizontal, a frame portion that supports the first mesh portion; and an annular gasket that is provided on the frame portion and seals a gap between the frame portion and an inner wall of the first tank, the frame portion has a wall portion extending upward from an upper edge of the first mesh portion along a side surface of the first tank, The wall portion is provided with a groove recessed in the front-rear direction in which the packing is placed.

7. A second tank that contains a liquid agent to be supplied to the washing tub and has a depth different from that of the first tank; a second automatic liquid agent dispenser connected to a second connection portion provided on the second tank; a second mesh portion provided inside the second tank, disposed upstream of the second connection portion and inclined with respect to a bottom surface of the second tank, and having through holes; The second tank is provided with a second float having a floating portion that is buoyant with respect to the liquid agent and a magnetic body that is spaced apart from the floating portion, a second sensor that detects the magnetism of the magnetic body of the second float; The washing machine according to claim 1 , wherein the apex of the second mesh portion is equal to or lower than the height of the liquid level passing through a part of the floating portion of the second float at the lower limit point.

8. The washing machine according to claim 7, wherein the first mesh portion and the second mesh portion are common to each other.

9. A washing tub rotatably provided in a housing; A first tank that contains a liquid agent to be supplied to the washing tub; a first automatic liquid agent dispenser connected to a first connection portion provided on the first tank; a first mesh portion provided inside the first tank, disposed upstream of the first connection portion and inclined with respect to a bottom surface of the first tank, and having a plurality of through holes; Equipped with The first tank is provided with a float having a floating portion that is buoyant with respect to the liquid agent and a magnetic body, Further, a magnetic sensor is provided to detect the magnetism of the magnetic body. The floating portion descends to a lower limit point, The vertices of the first mesh portion are the floating portion is lower than a first surface of the magnetic body that faces the magnetic sensor when the floating portion is located at the lowest point, and is lower than a part of the floating portion at the lowest point; The change rate of the output value of the magnetic sensor is set to a value equal to or lower than the liquid level when the change rate is smaller than the threshold value. the first mesh portion has an angle of 45° or less with respect to the horizontal, The first connection portion extends in a front-to-rear direction intersecting with a height direction.

Images