washing machine

Abstract

To provide a washing machine that can prevent foreign matter from clogging the pump of an automatic liquid dispensing device. [Solution] The water supply device 70, which functions as an automatic liquid dispensing device, includes a detergent tank 400 for storing liquid detergent and a fabric softener tank 500 for storing liquid fabric softener, a first water supply valve 621 connected to a water tap, a first water channel 612 through which water from the first water supply valve 621 flows toward the washing tub, a detergent inlet (second water inlet 632) connected to the detergent tank 400 and a fabric softener inlet (second water inlet 642) connected to the fabric softener tank 500, a pump 660 located downstream of the water flow from the detergent inlet in the first water channel 612, which draws liquid detergent from the detergent tank 400 and liquid fabric softener from the fabric softener tank 500 into the first water channel 612, and a water channel filter 670 located between the detergent inlet and the pump 660 in the first water channel 612.

Description

Technical Field

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

Background Art

[0002] A washing machine equipped with a liquid agent automatic feeding device that sucks the detergent liquid in the detergent tank and the softener liquid in the softener tank into the water channel by a pump unit arranged in the water channel, and then opens a water supply valve to let tap water flow into the water channel and supplies the detergent liquid and the softener liquid into the water tank together with the tap water is described in Patent Document 1.

[0003] The pump unit is composed of a cylinder, a piston, a pump motor for driving the piston, and check valves respectively arranged on the upstream side and the downstream side of the cylinder. When the pump motor is driven in a state where the detergent tank and the pump unit communicate with each other, the piston moves up and down in the cylinder, and the detergent in the detergent tank is sucked in. The same applies to the softener liquid.

[0004] The detergent liquid and the softener liquid are liquid agents for washing, and the detergent tank and the softener tank are liquid agent tanks for storing liquid agents for washing.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the washing machine described above, if foreign matter such as dust enters the liquid tank from the outside when the liquid is being dispensed, the pump unit may mix the foreign matter with the liquid and draw it into the water channel. Also, fine debris and other foreign matter may mix with the tap water and flow through the water channel. In such cases, there is a risk that the pump unit may become clogged with foreign matter, for example, in the check valve. This may cause the pump unit to malfunction, preventing the liquid from being supplied to the water channel, or making it difficult for tap water to flow through the water channel.

[0007] The present invention has been made in view of the above problems, and aims to provide a washing machine that can prevent foreign matter from clogging the pump of an automatic liquid dispensing device. [Means for solving the problem]

[0008] A washing machine according to the main embodiment of the present invention comprises a washing tub disposed within a casing in which laundry is washed, and an automatic liquid dispenser for dispensing a laundry liquid into the washing tub. The automatic liquid dispenser includes a liquid tank in which the liquid is stored, a water supply valve connected to a water tap, a water channel through which water from the water supply valve flows toward the washing tub, a liquid inlet provided in the water channel and connected to the liquid tank, a pump located downstream of the liquid inlet in the water channel and drawing the liquid from the liquid tank into the water channel through the liquid inlet, and a water channel filter located between the liquid inlet and the pump in the water channel.

[0009] According to the washing machine of this embodiment, foreign matter mixed in the liquid drawn from the liquid tank into the water channel by the operation of the pump, and foreign matter mixed in the water flowing through the water channel can be blocked by the water channel filter. As a result, it becomes more difficult for foreign matter to reach the pump, thus preventing clogging of the pump with foreign matter.

[0010] In the washing machine according to this embodiment, the automatic liquid dispensing device may be configured such that the liquid tank includes a detergent tank for storing liquid detergent and a fabric softener tank for storing liquid fabric softener, and the liquid inlet includes a detergent inlet connected to the detergent tank and a fabric softener inlet connected to the fabric softener tank. In this case, the water channel filter may be placed between the downstream inlet of the detergent inlet and the fabric softener inlet and the pump.

[0011] With the above configuration, both foreign matter mixed in the liquid detergent from the detergent tank and foreign matter mixed in the liquid fabric softener from the fabric softener tank can be blocked by the water channel filter.

[0012] In the washing machine according to this embodiment, the water channel filter may be configured to include a filter body having a filter surface on which a mesh is formed. In this case, within the water channel, the filter body may be arranged such that the filter surface is inclined with respect to a plane perpendicular to the direction of water flow.

[0013] With the above configuration, the surface area of ​​the filter, i.e., the mesh area, can be increased, making it less likely for foreign objects to clog the water channel filter.

[0014] In the above configuration, the waterway may further have a pair of inner wall surfaces that extend along the direction of water flow and face each other, and the waterway filter may have a pair of plate-shaped side surfaces on both sides of the filter body, the outer surfaces of which are in contact with the pair of inner wall surfaces.

[0015] Furthermore, in claim 4, the phrase "to be in contact" includes the concept of "to be in near contact."

[0016] With this configuration, the water channel filter is firmly sandwiched between the pair of inner wall surfaces, thus being stably fixed within the second vertical water channel.

[0017] In the washing machine according to this embodiment, the liquid tank may be configured to include an inlet into which the liquid is put and an outlet from which the liquid is discharged. In this case, the liquid tank may be provided with at least one of the following filters: an inlet filter that covers the inlet and an outlet filter that covers the outlet. The water channel filter may be configured to have a mesh smaller than the mesh of the at least one of the filters.

[0018] With the above configuration, foreign matter is captured by at least one filter, which suppresses the entry of foreign matter from the liquid tank into the waterway, thus preventing the waterway filter from becoming clogged with foreign matter. Furthermore, since the mesh size of the waterway filter is smaller than that of at least one filter, foreign matter that passes through that filter can be blocked by the waterway filter. [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a washing machine that can prevent foreign matter from clogging the pump of an automatic liquid dispensing device.

[0020] The effects and significance of the present invention will become even clearer from the description of the embodiments shown below. However, the following embodiments are merely examples of how to implement the present invention, and the present invention is not limited in any way to those described in the following embodiments. [Brief explanation of the drawing]

[0021] [Figure 1] Figure 1 is a side cross-sectional view of a fully automatic washing machine according to an embodiment. [Figure 2] Figure 2(a) is a perspective view of the ultrasonic cleaning device and top panel according to an embodiment, showing the ultrasonic cleaning device pulled out from the storage compartment. Figures 2(b) and (c) are perspective views of the main parts of the ultrasonic cleaning device and top panel according to an embodiment, showing the ultrasonic cleaning device stored in the storage compartment. [Figure 3] Figure 3 is a schematic diagram showing the configuration of a water supply system according to an embodiment. [Figure 4] Figs. 4(a) and (b) are respectively a plan view and a bottom view of a first water passage portion, a first three-way valve, a pump, and a detergent tank according to an embodiment. [Figure 5] Fig. 5 is a longitudinal sectional view of a detergent tank cut at the position of an inlet according to an embodiment. [Figure 6] Fig. 6 is a perspective view of a first water passage portion and a pump according to an embodiment. [Figure 7] Fig. 10 is a longitudinal sectional view of a main part of a first water passage portion cut in the front-rear direction at the positions of a first vertical water passage and a second vertical water passage according to an embodiment. [Figure 8] Fig. 13 is a longitudinal sectional view of a main part of a first water passage portion cut in the left-right direction at the position of a second vertical water passage according to an embodiment. [Figure 9] Fig. 16 is a longitudinal sectional view of a main part of a first water passage portion and a pump cut in the left-right direction at the positions of a suction port and a discharge port of the pump according to an embodiment. [Figure 10] Figs. 10(a) and (b) are perspective views of a water passage filter according to an embodiment. [Figure 11] Fig. 11 is a longitudinal sectional view of a main part of a first water passage portion cut in the left-right direction at the position of a second vertical water passage according to Modification 1.

Embodiments for Carrying Out the Invention

[0022] Hereinafter, an embodiment of a washing machine of the present invention will be described with reference to the drawings.

[0023] Fig. 1 is a side sectional view of a fully automatic washing machine 1.

[0024] The fully automatic washing machine 1 comprises a housing 10 that forms the outer casing. The housing 10 includes a rectangular cylindrical body 11 with open top and bottom surfaces, a top plate 12 that covers the top surface of the body 11, and a leg base 13 that supports the body 11. A laundry loading opening 14 is formed in the top plate 12. The loading opening 14 is covered by a top lid 15 that can be opened and closed. A control unit is located inside the top plate 12. The control unit controls the washing operation by the fully automatic washing machine 1 and the cleaning operation by the ultrasonic cleaning device 50.

[0025] An outer tub 20 with an open top is placed inside the housing 10. The outer tub 20 is elastically suspended and supported by four suspension rods 21 having vibration damping devices. A washing and dewatering tub 22 is placed inside the outer tub 20. The washing and dewatering tub 22 has an open top and rotates around a rotation axis that extends vertically. Numerous dewatering holes 22a are formed around the entire inner circumference of the washing and dewatering tub 22. A balance ring 23 is provided on the top of the washing and dewatering tub 22. A pulsator 24 is placed at the bottom of the washing and dewatering tub 22. Multiple blades 24a are provided radially on the surface of the pulsator 24. The outer tub 20 and the washing and dewatering tub 22 constitute a washing tub W in which laundry is washed.

[0026] A drive unit 30 is positioned at the outer bottom of the outer tub 20 to generate torque for driving the washing and dewatering tub 22 and the pulsator 24. The drive unit 30 includes a drive motor 31 and a transmission mechanism 32. The transmission mechanism 32 has a clutch mechanism 32a, and through a switching operation by the clutch mechanism 32a, the torque of the drive motor 31 is transmitted only to the pulsator 24 during the washing and rinsing processes to rotate only the pulsator 24, and during the dewatering process, the torque of the drive motor 31 is transmitted to the pulsator 24 and the washing and dewatering tub 22 to rotate the pulsator 24 and the washing and dewatering tub 22 together.

[0027] A drain port 20a is formed at the outer bottom of the outer tub 20. A drain valve 40 is provided in the drain port 20a. The drain valve 40 includes, for example, a valve and a torque motor for opening and closing the valve. A drain hose 41 is connected to the drain valve 40. When the drain valve 40 is opened, the water accumulated in the washing and dewatering tub 22 and the outer tub 20 is discharged outside the machine through the drain hose 41.

[0028] An overflow section 25 with an overflow port 20b on its upper surface is provided at the top of the outer tank 20. When water accumulates in the outer tank 20 above a predetermined overflow level, water is discharged from the overflow port 20b. One end of an overflow pipe 26 is connected to the bottom of the overflow section 25. The other end of the overflow pipe 26 is connected to a drain hose 41. The water discharged from the overflow port 20b flows through the overflow section 25 and the overflow pipe 26 to the drain hose 41.

[0029] An ultrasonic cleaning device 50 is positioned near the center of the rear of the top panel 12. The ultrasonic cleaning device 50 performs a cleaning operation to remove dirt partially attached to the object to be cleaned prior to washing in the fully automatic washing machine 1.

[0030] A drain receiving section 60 is positioned at the rear of the top plate 12, below the ultrasonic cleaning device 50. The drain receiving section 60 receives water discharged from the water storage tank 210. A discharge hole 61 is formed in the drain receiving section 60 through which the received water is discharged. One end of a drain pipe 62 is connected to the discharge hole 61. The other end of the drain pipe 62 is connected to the upper part of the overflow pipe 26. The water received by the drain receiving section 60 is discharged into the drain hose 41 through the drain pipe 62 and the overflow pipe 26.

[0031] A water supply device 70 is positioned at the rear of the top panel 12, surrounding the ultrasonic cleaning device 50. The water supply device 70 is connected to a water tap and has the function of supplying water to the washing and spinning tub 22 and the outer tub 20, i.e., the washing tub W. The water supply device 70 also functions as an automatic liquid dispenser that automatically dispenses liquid detergent and liquid fabric softener into the washing tub W. Furthermore, the water supply device 70 also has the function of supplying cleaning water to the water tank 210 of the ultrasonic cleaning device 50. Liquid detergent and liquid fabric softener are liquid agents for laundry. Hereafter, liquid detergent and liquid fabric softener may be collectively referred to as "liquid agents".

[0032] Figure 2(a) is a perspective view of the ultrasonic cleaning device 50 and the top plate 12, showing the ultrasonic cleaning device 50 pulled out from the storage compartment 17. Figures 2(b) and (c) are perspective views of the main parts of the ultrasonic cleaning device 50 and the top plate 12, showing the ultrasonic cleaning device 50 stored in the storage compartment 17. In Figure 2(c), the cover 17b is omitted from the illustration so that the inside of the storage compartment 17 is visible.

[0033] Referring to Figures 2(a) to (c), the top panel 12 is provided with a storage compartment 17 in the rear center for housing the ultrasonic cleaning device 50. The top panel 12 opens in front of the storage compartment 17 as an entrance / exit 17a. A cover 17b is provided over the entrance / exit 17a.

[0034] The ultrasonic cleaning device 50 comprises an ultrasonic cleaning unit 100, a water storage unit 200, and a base unit 300. The ultrasonic cleaning unit 100 has an ultrasonic generator 110 that generates ultrasonic waves and is held by the base unit 300. The water storage unit 200 is provided with a water tank 210 located below the ultrasonic generator 110, in which cleaning water is stored. Cleaning water is supplied to the water tank 210 from a supply nozzle 80 connected to a water supply device 70. The water storage unit 200 is detachably attached to the base unit 300.

[0035] As shown in Figure 2(a), when a cleaning operation is performed, the ultrasonic cleaning device 50 is pulled forward from the storage compartment 17 and protrudes inward from the input opening 14 of the top plate 12. On the other hand, as shown in Figures 2(b) and (c), when a cleaning operation is not performed, the ultrasonic cleaning device 50 is stored in the storage compartment 17. The entrance 17a of the storage compartment 17 is closed by the cover 17b.

[0036] As shown in Figure 2(a), the top plate 12 has a funnel-shaped detergent spout 18 to the left rear of the inlet 14 and a funnel-shaped fabric softener spout 19 to the right rear of the inlet 14. An opening 18a formed in the center of the detergent spout 18 connects to the inlet 401 of the detergent tank 400 located directly below the detergent spout 18. Similarly, an opening 19a formed in the center of the fabric softener spout 19 connects to the inlet 501 of the fabric softener tank 500 located directly below the fabric softener spout 19. Liquid detergent is poured into the detergent tank 400 through the detergent spout 18, and liquid fabric softener is poured into the fabric softener tank 500 through the fabric softener spout 19. When liquid detergent and liquid fabric softener are not being poured, the detergent spout 18 and the fabric softener spout 19 are covered by openable and closable covers (not shown).

[0037] Figure 3 is a schematic diagram showing the configuration of the water supply system 70.

[0038] The water supply device 70 comprises a detergent tank 400, a fabric softener tank 500, and a water supply unit 600. The detergent tank 400 stores enough liquid detergent for multiple wash cycles. The fabric softener tank 500 stores enough liquid fabric softener for multiple wash cycles. The water supply unit 600 takes in liquid detergent and liquid fabric softener from the detergent tank 400 and the fabric softener tank 500, respectively, and flows the taken-in liquid detergent and liquid fabric softener into the washing and spin-drying tub 22 with water supplied to the washing and spin-drying tub 22. In this way, the water supply unit 600 puts the liquid detergent in the detergent tank 400 and the liquid fabric softener in the fabric softener tank 500 into the washing and spin-drying tub 22, i.e., into the washing tub W. The detergent tank 400 and the fabric softener tank 500 correspond to the "liquid tanks" of the present invention.

[0039] The detergent tank 400 is formed of, for example, a resin material and has a box-like shape that is long from front to back. A circular inlet 401 is formed on the top surface of the detergent tank 400. A circular discharge section 402 that protrudes downward is formed on the bottom surface of the detergent tank 400. A cylindrical discharge port 403 that extends to the rear is formed on the circumferential surface of the discharge section 402.

[0040] The fabric softener tank 500 is made of, for example, a resin material and has a box-like shape that is long from front to back. A circular opening 501 is formed on the top surface of the fabric softener tank 500. A circular discharge section 502 that protrudes downward is formed on the bottom surface of the fabric softener tank 500. A cylindrical discharge port 503 that extends to the rear is formed on the circumferential surface of the discharge section 502.

[0041] The water supply unit 600 includes a water channel member 610, a water supply valve module 620, a first three-way valve 630, a second three-way valve 640, a third three-way valve 650, a pump 660, and a water channel filter 670.

[0042] The water channel member 610 is formed by connecting a first water channel section 610a, a second water channel section 610b, and a third water channel section 610c, each made of resin material. The first water channel section 610a is located on the detergent tank 400 side, the second water channel section 610b is located on the fabric softener tank 500 side, and the third water channel section 610c is located between the first water channel section 610a and the second water channel section 610b.

[0043] The water channel member 610 is provided with a water inlet chamber 611 in the first water channel section 610a. At the bottom of the water inlet chamber 611, a water inlet 611a is formed at the front end. The water inlet 611a faces above the washing and dewatering tub 22.

[0044] The water channel member 610 has a first water channel 612 and a second water channel 613 connected to the water injection chamber 611, and is provided with a water inlet 614 for the first water channel 612 and a water inlet 615 for the second water channel 613. Furthermore, the water channel member 610 has a branch water channel 616 that branches off from the first water channel 612 for supplying water into the water storage tank 210. The outlet 616a of the branch water channel 616 is connected to the supply nozzle 80 via a connecting hose 81. The first water channel 612 corresponds to the "water channel" of the present invention.

[0045] In the first water channel 612, the second three-way valve 640, the first three-way valve 630, the pump 660, and the third three-way valve 650 are arranged in order from upstream along the path from the inlet 614 to the water injection chamber 611. Therefore, the first water channel 612 is divided at the positions of the second three-way valve 640, the first three-way valve 630, the pump 660, and the third three-way valve 650, and each of these positions has upstream connection ports 617a, 617b, 617c, 617d and downstream connection ports 618a, 618b, 618c, 618d.

[0046] The water supply valve module 620 is a so-called double valve, comprising a first water supply valve 621 and a second water supply valve 622 having a higher rated flow rate than the first water supply valve 621. The water inlet 623 of the water supply valve module 620 is connected to a water tap via a water supply hose (not shown). The outlet 624 of the first water supply valve 621 is connected to the inlet 614, and the outlet 625 of the second water supply valve 622 is connected to the inlet 615. The first water supply valve 621 corresponds to the "water supply valve" of the present invention.

[0047] The first three-way valve 630 and the second three-way valve 640 have first inlets 631, 641, second inlets 632, 642, and outlets 633, 643, and can be switched between a state in which the first inlets 631, 641 and outlets 633, 643 are connected, and a state in which the second inlets 632, 642 and outlets 633, 643 are connected. The third three-way valve 650 has an inlet 651, a first outlet 652, and a second outlet 653, and can be switched between a state in which the inlet 651 and the first outlet 652 are connected, and a state in which the inlet 651 and the second outlet 653 are connected.

[0048] The first inlet 631 and outlet 633 of the first three-way valve 630 are connected to the upstream connection port 617b and the downstream connection port 618b, respectively, and constitute part of the first waterway 612. The first inlet 641 and outlet 643 of the second three-way valve 640 are connected to the upstream connection port 617a and the downstream connection port 618a, respectively, and constitute part of the first waterway 612. The inlet 651, first outlet 652, and second outlet 653 of the third three-way valve 650 are connected to the upstream connection port 617d, the downstream connection port 618d, and the connection port 616b of the branch waterway 616, respectively.

[0049] The second inlet 632 of the first three-way valve 630 is connected to the outlet 403 of the detergent tank 400 via a rubber detergent supply pipe 410. The second inlet 632 is located in the first water channel 612 and serves as the detergent inlet to which the detergent tank 400 is connected. In addition, the second inlet 642 of the second three-way valve 640 is connected to the outlet 503 of the fabric softener tank 500 via a rubber fabric softener supply pipe 510. The second inlet 642 is located in the first water channel 612 and serves as the fabric softener inlet to which the fabric softener tank 500 is connected.

[0050] Pump 660 is a piston-type pump. The suction port 664 and discharge port 665 of pump 660 are connected to the upstream connection port 617c and the downstream connection port 618c, respectively. Pump 660 is located downstream of the water flow in the first water channel 612, below the second inlet 632, which is the detergent inlet, and the second inlet 642, which is the fabric softener inlet, and draws liquid detergent from the detergent tank 400 and liquid fabric softener from the fabric softener tank 500 into the first water channel 612 through the second inlets 632 and 642.

[0051] The water channel filter 670 is positioned between the second inlet 632, which is the downstream inlet of the detergent inlet and fabric softener inlet in the first water channel 612, and the pump 660, so as to block the first water channel 612 and block foreign matter flowing through the first water channel 612.

[0052] Figures 4(a) and 4(b) are plan and bottom views, respectively, of the first water channel 610a, the first three-way valve 630, the pump 660, and the detergent tank 400. Figure 5 is a longitudinal cross-sectional view of the detergent tank 400 cut at the location of the inlet 401. Figure 6 is a perspective view of the first water channel 610a and the pump 660. Figure 7 is a longitudinal cross-sectional view of the main part of the first water channel 610a cut in the front-to-back direction at the locations of the first longitudinal water channel 685 and the second longitudinal water channel 686. Figure 8 is a longitudinal cross-sectional view of the main part of the first water channel 610a cut in the left-to-right direction at the location of the second longitudinal water channel 686. Figure 9 is a longitudinal cross-sectional view of the main part of the first water channel 610a and the pump 660 cut in the left-to-right direction at the locations of the suction port 664 and discharge port 665 of the pump 660. Figures 10(a) and 10(b) are perspective views of the water channel filter 670. In Figures 6 to 9, the upper cover 682 of the first waterway section 610a has been removed.

[0053] As shown in Figures 4(a) and (b), the first water channel 610a and the detergent tank 400 are positioned close together in the left-right direction. The first three-way valve 630 is positioned between the first water channel 610a and the detergent tank 400 so as to overlap the detergent tank 400 in the vertical direction. The pump 660 is located in front of the first water channel 610a.

[0054] The first water channel section 610a is constructed by joining the main body section 681, the upper cover 682, and the lower cover 683 by welding or the like. The first water channel 612 and a portion of the second water channel 613 are formed between the upper part of the main body section 681 and the upper cover 682. The lower cover 683 constitutes the bottom surface of the water injection chamber 611 and has a water injection port 611a.

[0055] As shown in Figure 5, the detergent tank 400 is equipped with a removable filter unit 700. The filter unit 700 is inserted into the inside of the detergent tank 400 through the inlet 401.

[0056] The filter unit 700 includes an inlet filter 710 and an outlet filter 720 integrally formed below the inlet filter 710. The filter unit 700 is provided with a handle portion 730 above the inlet filter 710. The handle portion 730 is used to hold the filter unit 700 when attaching or detaching it from the detergent tank 400.

[0057] The inlet filter 710 is formed in a nearly bottomed cylindrical shape and has a mesh 713 on its circumferential surface 711 and bottom surface 712. The mesh 713 is composed of a plurality of rectangular holes 713a arranged in a grid pattern. The inlet filter 710 covers the inlet 401 from the inside of the detergent tank 400.

[0058] The discharge filter 720 includes a disc-shaped bottom portion 721, an arc-shaped side portion 722 rising from the periphery of the bottom portion 721, and a connecting portion 723 that connects the bottom portion 721 and the side portion 722 to the inlet filter 710. The discharge filter 720 has a mesh 724 on the bottom portion 721 and the side portion 722. The mesh 724 is composed of a plurality of rectangular holes 724a arranged in a grid pattern. The discharge filter 720 enters the discharge portion 402, and the side portion 722 covers the discharge portion 403 from the inside of the detergent tank 400.

[0059] The inlet filter 710 captures foreign matter such as dust that enters the detergent tank 400 from the outside through the inlet 401. The outlet filter 720 captures foreign matter that is trying to flow into the outlet 403 mixed with the liquid detergent. In addition, the outlet filter 720 captures solidified liquid detergent if it accumulates in the outlet 402.

[0060] Similar to the detergent tank 400, the fabric softener tank 500 is also equipped with a removable filter unit 700.

[0061] As shown in Figures 6 to 8, in the first channel section 610a, the first channel 612 includes a first transverse channel 684 extending horizontally (front-back, left-right direction) upstream of the upstream connection port 617b, and a first longitudinal channel 685 extending vertically (up and down direction) from the first transverse channel 684 toward the upstream connection port 617b. The first channel 612 also includes a second longitudinal channel 686 extending vertically between the downstream connection port 618b and the upstream connection port 617c, and a second transverse channel 687 extending horizontally from the second longitudinal channel 686 toward the upstream connection port 617c. Furthermore, the first waterway 612 includes a third transverse waterway 688 extending horizontally between the downstream connection port 618c and the upstream connection port 617d, and a third longitudinal waterway 689 extending vertically from the third transverse waterway 688 toward the upstream connection port 617d. In this embodiment, the second longitudinal waterway 686 is the arrangement area in the first waterway 612 where the waterway filter 670 is located.

[0062] The tip of the second water channel 613 is located above the water injection chamber 611 and has a plurality of water injection holes 613a on its bottom surface.

[0063] As shown in Figures 6 and 9, the pump 660 includes a cylinder 662 containing a piston 661 and a motor 663 for driving the piston 661. The cylinder 662 has a cylindrical suction port 664 and a discharge port 665 formed at its upper end. The suction port 664 is connected to an upstream connection port 617c, and the discharge port 665 is connected to a downstream connection port 618c. A first check valve 666 is provided inside the suction port 664, and a second check valve 667 is provided inside the discharge port 665.

[0064] When the motor 663 operates, the piston 661 moves up and down. When the piston 661 moves down, the first check valve 666 opens, and when the piston 661 moves up, the second check valve 667 opens.

[0065] As shown in Figures 10(a) and (b), the channel filter 670 includes a filter body 671 and a pair of side sections 672. The channel filter 670 has a shape corresponding to the second vertical channel 686, which is elongated in the vertical direction and has a substantially rectangular shape, with its longitudinal dimension being slightly longer than the vertical dimension of the second vertical channel 686.

[0066] The filter body 671 has an elongated, almost rectangular plate shape. A mesh 673 is formed on almost the entire surface of the filter body 671a, except for the upper and lower ends. The mesh 673 is composed of a plurality of circular holes 673a arranged in a grid pattern. The mesh 673 of the filter body 671 is smaller than the mesh 713 of the inlet filter 710 and the mesh 724 of the outlet filter 720. That is, the size of the holes 673a of the mesh 673 of the filter body 671 is smaller than the size of the holes 713a of the mesh 713 of the inlet filter 710 and the holes 724a of the mesh 724 of the outlet filter 720. Furthermore, the filter body 671 is provided with a projection 674 at its lower end that protrudes below a pair of side portions 672.

[0067] The pair of side sections 672 are provided on both the left and right sides of the filter body 671 and have a nearly elongated rectangular plate shape with their upper ends slightly protruding rearward. The filter body 671 is inclined in the front-to-back direction with respect to the pair of side sections 672.

[0068] As shown in Figures 7 and 8, the channel filter 670 is positioned within the second vertical channel 686. The channel filter 670 is inserted into the second vertical channel 686 from above before the upper cover 682 is attached to the main body 681. Once the upper cover 682 is attached, the upper end of the channel filter 670 comes into close proximity to the upper cover 682. This prevents the channel filter 670 from being pulled out of the second vertical channel 686 upwards.

[0069] The second longitudinal channel 686 has a pair of inner wall surfaces 686a in the front-to-back direction and a pair of inner wall surfaces 686b in the left-to-right direction. The pair of inner wall surfaces 686a and 686b extend along the direction of water flow and face each other.

[0070] The outer surfaces of the pair of side portions 672 of the water channel filter 670 are in near contact with the pair of inner wall surfaces 686a in the front-rear direction of the second vertical water channel 686. As a result, the water channel filter 670 is firmly sandwiched between the pair of inner wall surfaces 686a and is stably fixed within the second vertical water channel 686. In addition, both the front and rear ends of the pair of side portions 672 are in near contact with the pair of inner wall surfaces 686b in the left-right direction of the second vertical water channel 686. As a result, the water channel filter 670 is also sandwiched between the pair of inner wall surfaces 686b and is even more stably fixed within the second vertical water channel 686.

[0071] Within the second vertical channel 686, that is, within the first channel 612, the filter body 671 is positioned such that the filter surface 671a is inclined with respect to the plane (flow channel cross-section) perpendicular to the direction in which the second vertical channel 686 extends (vertical direction), that is, the direction of water flow, thereby blocking the second vertical channel 686. This allows for a larger area of ​​the filter surface 671a, i.e., the area of ​​the mesh 673, compared to a configuration where the filter surface 671a is parallel to the vertical plane.

[0072] In this embodiment, the filter body 671 is tilted such that its lower end is close to the right inner wall surface 686b and its upper end is close to the left inner wall surface 686b (see Figure 8). However, the filter body 671 may also be tilted such that its lower end is close to the left inner wall surface 686b and its upper end is close to the right inner wall surface 686b. In this case, the upper end of the filter body 671 is not made to protrude into the second lateral water channel 687 so as not to obstruct the flow of water into the second lateral water channel 687.

[0073] Furthermore, the filter body 671 may be configured to be positioned within the second vertical channel 686 after being rotated 90 degrees horizontally from the state shown in Figure 8.

[0074] With the water channel filter 670 positioned within the second vertical water channel 686, the projection 674 at the lower end of the filter body 671 can be seen from the downstream connection port 618b before the first three-way valve 630 is installed. This allows confirmation of whether or not the water channel filter 670 is installed even after the upper cover 682 is attached to the main body 681.

[0075] The fully automatic washing machine 1 can perform various washing cycles. In a washing cycle, the washing, intermediate spin-drying, rinsing, and final spin-drying processes are executed in order. Depending on the washing cycle, the rinsing and intermediate spin-drying processes may be performed multiple times (for example, twice).

[0076] During the washing and rinsing cycles, the pulsator 24 rotates clockwise and counterclockwise with water accumulated in the washing and spinning tub 22. The rotation of the pulsator 24 generates a water flow within the washing and spinning tub 22. During the washing cycle, the laundry is washed by the generated water flow and the detergent contained in the water. During the rinsing cycle, the laundry is rinsed by the generated water flow.

[0077] In the intermediate and final dewatering processes, the washing and dewatering tub 22 and the pulsator 24 rotate together at high speed. The laundry is dewatered by the centrifugal force generated in the washing and dewatering tub 22.

[0078] During the washing cycle, liquid detergent is automatically dispensed into the washing and spinning tub 22 (outer tub 20) by the water supply device 70. If the rinsing cycle is performed once, liquid fabric softener is automatically dispensed into the washing and spinning tub 22 during the first rinse cycle. If the rinsing cycle is performed multiple times, liquid fabric softener is automatically dispensed into the washing and spinning tub 22 during the final rinse cycle by the water supply device 70.

[0079] When liquid detergent is added, first, the first three-way valve 630 is switched to a state where the second inlet 632 and the outlet 633 are in communication. This connects the first water channel 612 and the detergent tank 400 via the detergent supply pipe 410. At this time, the third three-way valve 650 is switched to a state where the inlet 651 and the first outlet 652 are in communication, and the first water channel 612 is blocked from the branch water channel 616 and connected to the water filling chamber 611. Also, the second three-way valve 640 is switched to a state where the first inlet 641 and the outlet 643 are in communication, and the first water channel 612 is connected at the position of the second three-way valve 640.

[0080] Pump 660 operates, drawing in air upstream of pump 660 within the first water channel 612, creating negative pressure upstream. As a result, liquid detergent in the detergent tank 400 is drawn in, as shown by the dashed line in Figure 3, and sent into the first water channel 612 via the detergent supply pipe 410. An amount of liquid detergent corresponding to the operating time of pump 660 accumulates in the first water channel 612.

[0081] Next, the first three-way valve 630 is switched to a state where the first water inlet 631 and the water outlet 633 are in communication. As a result, the connection between the first water channel 612 and the detergent tank 400 is closed, and the first water channel 612 is connected at the position of the first three-way valve 630.

[0082] The first water supply valve 621 is opened, and water (tap water) from the water tap is supplied into the first water channel 612, as shown by the solid arrow in Figure 3. The water flowing through the first water channel 612 washes away the liquid detergent accumulated in the first water channel 612. The liquid detergent washed away by the water flows with the water into the water filling chamber 611 and is poured into the washing and drying tub 22 from the water filling port 611a.

[0083] When liquid fabric softener is added, first, the second three-way valve 640 is switched to a state where the second water inlet 642 and the water outlet 643 are in communication. This connects the first water channel 612 and the fabric softener tank 500 via the fabric softener supply pipe 510. At this time, as with the addition of liquid detergent, the first water channel 612 is connected to the water filling chamber 611. In addition, the first three-way valve 630 is switched to a state where the first water inlet 631 and the water outlet 633 are in communication, and the first water channel 612 is connected at the position of the first three-way valve 630.

[0084] Pump 660 is activated, and as shown by the dashed line in Figure 3, liquid fabric softener in the fabric softener tank 500 is drawn in and sent into the first water channel 612 via the fabric softener supply pipe 510. An amount of liquid fabric softener corresponding to the operating time of pump 660 accumulates in the first water channel 612.

[0085] Next, the second three-way valve 640 is switched to a state where the first water inlet 641 and the water outlet 643 are in communication. This closes the connection between the first water channel 612 and the fabric softener tank 500, and the first water channel 612 is connected at the position of the second three-way valve 640. The first water supply valve 621 is opened, and water from the tap is supplied into the first water channel 612, as shown by the solid arrow in Figure 3. The liquid fabric softener accumulated in the first water channel 612 is pushed by the water flowing through the first water channel 612 and flows into the water filling chamber 611, where it is poured into the washing and drying tub 22 from the water filling port 611a.

[0086] The fully automatic washing machine 1 can perform a cleaning operation using the ultrasonic cleaning device 50 described above. During the cleaning operation, after cleaning water is stored in the water tank 210, the soiled parts of the laundry are placed between the water tank 210 and the ultrasonic generator 110. The ultrasonic generator 110 operates, and ultrasonic waves act on the soiled parts of the laundry immersed in the cleaning water, removing the dirt from the laundry.

[0087] When washing water is supplied to the water storage tank 210 by the water supply device 70, first, the third three-way valve 650 is switched to a state in which the water inlet 651 and the second water outlet 653 are in communication. As a result, the first water channel 612 is isolated from the water injection chamber 611 and connected to the branch water channel 616. Similar to when detergent is added to the washing and dewatering tub 22, the first three-way valve 630 is switched to a state in which liquid detergent can flow into the first water channel 612, after which the pump 660 operates and the liquid detergent in the detergent tank 400 is sent into the first water channel 612 and accumulates in the first water channel 612.

[0088] Next, the first three-way valve 630 is switched to a state where the first water channel 612 is connected at the position of the first three-way valve 630. Then, the first water supply valve 621 is opened, and water from the tap is supplied into the first water channel 612. The liquid detergent accumulated in the first water channel 612 is pushed by the water flowing through the first water channel 612 and mixed with the water to become cleaning water. The cleaning water flows into the water storage tank 210 through the branch water channel 616, the connecting hose 81 and the supply nozzle 80. When a predetermined amount of cleaning water has accumulated in the water storage tank 210, the first water supply valve 621 is closed.

[0089] Now, if foreign matter such as dust enters the detergent tank 400 from the outside when liquid detergent is added, the operation of the pump 660 may cause the foreign matter to mix with the liquid detergent and be drawn into the first water channel 612. The detergent tank 400 is equipped with a filter unit 700, namely an inlet filter 710 and an outlet filter 720, but foreign matter smaller than the mesh size 713 and 724 of these filters 710 and 720 can pass through the mesh size 713 and 724 and enter the first water channel 612. In particular, if the filter unit 700 is not installed in the detergent tank 400, foreign matter is more likely to enter the first water channel 612. Similarly, foreign matter may also enter the first water channel 612 from the fabric softener tank 500.

[0090] Furthermore, it is possible that fine debris and other foreign matter may mix with the water (tap water) and be supplied from the tap, flowing through the first water channel 612. Even if a filter is provided at the water inlet 623 of the water supply valve module 620, foreign matter smaller than the mesh of the filter may still flow into the first water channel 612.

[0091] Foreign matter mixed in the liquid (liquid detergent, liquid fabric softener) and foreign matter mixed in the water are blocked by the water channel filter 670 (mesh 673 of the filter body 671) as the liquid and water pass through the second vertical water channel 686. This makes it difficult for foreign matter to reach the pump 660 located downstream of the water channel filter 670, thus preventing clogging of the pump 660, particularly at the first check valve 666 of the pump 660. Furthermore, since the mesh 673 of the water channel filter 670 is smaller than the mesh 713 and 724 of the inlet filter 710 and outlet filter 720, foreign matter that has passed through these filters 710 and 720 can also be blocked.

[0092] Here, the water channel filter 670 is positioned such that the filter surface 671a is inclined with respect to a plane perpendicular to the direction of water flow, thereby increasing the area of ​​the filter surface 671a, i.e., the area of ​​the mesh 673. This makes it less likely for foreign matter to clog the water channel filter 670 (mesh 673).

[0093] Furthermore, foreign matter is captured by the inlet filter 710 and outlet filter 720 provided in the detergent tank 400 and the fabric softener tank 500, thereby suppressing the entry of foreign matter from the detergent tank 400 and the fabric softener tank 500 into the first water channel 612. As a result, foreign matter becomes even less likely to clog the water channel filter 670.

[0094] Furthermore, the water channel filter 670 is positioned within the second vertical water channel 686, which extends vertically, and within the second vertical water channel 686, the liquid agent and water flow from bottom to top. Therefore, when there is no water left in the second vertical water channel 686, any foreign matter blocked by the water channel filter 670 is more likely to fall due to gravity and detach from the water channel filter 670. Thus, foreign matter becomes even less likely to clog the water channel filter 670.

[0095] <Effects of the Embodiment> As described above, according to this embodiment, the water supply device 70, which is an automatic liquid dispensing device, is equipped with a water channel filter 670 located between the second water inlet 632, which is a detergent inlet, and the pump 660 in the first water channel 612.

[0096] With this configuration, the water channel filter 670 can block foreign matter mixed in the liquid detergent or liquid fabric softener drawn into the first water channel 612 from the detergent tank 400 or fabric softener tank 500 by the operation of the pump 660, as well as foreign matter mixed in the water flowing through the first water channel 612. As a result, it becomes difficult for foreign matter to reach the pump 660 located downstream of the water channel filter 670, thus preventing clogging of the pump 660 with foreign matter.

[0097] Furthermore, according to this embodiment, the channel filter 670 includes a filter body 671 having a filter surface 671a on which a mesh 673 is formed, and the filter body 671 is arranged in the second vertical channel 686 of the first channel 612 such that the filter surface 671a is inclined with respect to a plane perpendicular to the direction of water flow.

[0098] This configuration allows for a larger area of ​​the filter surface 671a, i.e., the area of ​​the mesh 673, making it less likely for foreign objects to clog the water channel filter 670.

[0099] Furthermore, according to this embodiment, the second longitudinal channel 686 of the first channel 612 has a pair of inner wall surfaces 686a that extend along the direction of water flow and face each other, and the channel filter 670 has a pair of plate-shaped side surfaces 672 on both sides of the filter body 671, the outer surfaces of which are in contact with the pair of inner wall surfaces 686a.

[0100] With this configuration, the water channel filter 670 is firmly sandwiched between the pair of inner wall surfaces 686a, and is therefore stably fixed within the second vertical water channel 686.

[0101] Furthermore, according to this embodiment, the detergent tank 400 and the fabric softener tank 500 are provided with an inlet filter 710 that covers the inlet 401, 501 and an outlet filter 720 that covers the outlet 403, 503, and the water channel filter 670 has a mesh 673 that is smaller than the mesh 713, 724 of these filters 710, 720.

[0102] With this configuration, foreign matter is captured by the inlet filter 710 and the outlet filter 720, which suppresses the entry of foreign matter from the detergent tank 400 and the fabric softener tank 500 into the first water channel 612, thus making it less likely for foreign matter to clog the water channel filter 670. Furthermore, since the mesh size 673 of the water channel filter 670 is smaller than the mesh sizes 713 and 724 of the inlet filter 710 and the outlet filter 720, foreign matter that has passed through these filters 710 and 720 can be blocked by the water channel filter 670.

[0103] Although embodiments of the present invention have been described above, the present invention is not limited in any way by the above embodiments, and various modifications are possible to the embodiments of the present invention other than those described above.

[0104] <Example of change 1> In the above embodiment, the channel filter 670 cannot be attached to or detached from the first channel 612. In contrast, in this modified example, the channel filter 670 is configured to be attached to or detached from the first channel 612.

[0105] Figure 11 is a longitudinal cross-sectional view of the main part of the first channel section 610a, cut in the left-right direction at the location of the second longitudinal channel 686, according to modification example 1.

[0106] In the first water channel section 610a, an inlet / outlet 691 is formed in the upper cover 682 at a position directly above the second vertical water channel 686. The inlet / outlet 691 is formed in a cylindrical shape and has a threaded portion 691a on its inner wall surface. The inlet / outlet 691 is closed by a cap 692. The cap 692 has a threaded portion 692a that engages with the threaded portion 691a of the inlet / outlet 691. The cap 692 is also provided with an annular packing 693 that creates a water seal between it and the inlet / outlet 691. By removing the cap 692 and opening the inlet / outlet 691, the water channel filter 670 can be moved in and out of the second vertical water channel 686 through the inlet / outlet 691. The top plate 12 is provided with an opening corresponding to the inlet / outlet 691, and this opening is covered by a lid that can be opened and closed.

[0107] With this configuration, the water channel filter 670 can be removed from the first water channel 612 for cleaning.

[0108] <Other examples of changes> In the above embodiment, the channel filter 670 is positioned within the second longitudinal channel 686 of the first channel 612 such that its filter surface 671a is inclined with respect to a plane perpendicular to the direction of water flow. However, the channel filter 670 may also be configured to be positioned within the first channel 612 such that its filter surface 671a is parallel to a plane perpendicular to the direction of water flow. In particular, when a wide flow path cross-section can be secured in the area where the channel filter 670 is positioned in the first channel 612, or when the channel filter 670 is detachable from the first channel 612, as in the above modified example 1, a configuration in which the filter surface 671a of the channel filter 670 is not inclined is more likely to be adopted.

[0109] Furthermore, in the above embodiment, both the detergent tank 400 and the fabric softener tank 500 are provided with an inlet filter 710 and an outlet filter 720, but only one of the filters may be provided. Moreover, neither the inlet filter 710 nor the outlet filter 720 may be provided in the detergent tank 400 or the fabric softener tank 500.

[0110] Furthermore, in the above embodiment, the detergent tank 400 and the fabric softener tank 500 are fixed inside the top plate 12. However, a configuration may be adopted in which the detergent tank 400 and the fabric softener tank 500 can be inserted into and removed from the top plate 12. In this case, the top plate 12 is not provided with a detergent spout 18 and a fabric softener spout 19, and the openings 401 and 501 of the detergent tank 400 and the fabric softener tank 500 are provided with lids that can be opened and closed.

[0111] Furthermore, the configurations of the water channel filter 670, the inlet filter 710, and the outlet filter 720 are not limited to the configurations of the above embodiment, and may be any configuration.

[0112] Furthermore, in the above embodiment, in the first water channel 612, the second inlet 632, which is the detergent inlet, is located downstream of the second inlet 642, which is the fabric softener inlet. However, the second inlet 642, which is the fabric softener inlet, may also be located downstream of the second inlet 632, which is the detergent inlet. In this case, in the first water channel 612, a water channel filter 670 is placed between the second inlet 642 and the pump 660.

[0113] Furthermore, in the above embodiment, a first three-way valve 630 is used to switch the liquid detergent introduction path between the first water channel 612 and the detergent tank 400 between an open state and a closed state, and a second three-way valve 640 is used to switch the liquid fabric softener introduction path between the first water channel 612 and the fabric softener tank 500 between an open state and a closed state. However, the opening and closing of the introduction paths may be performed by an on / off valve such as an electromagnetic valve.

[0114] Furthermore, in the above embodiment, the water supply device 70, which is an automatic liquid dispensing device, includes a detergent tank 400 and a fabric softener tank 500 as liquid tanks, and is configured to dispense both liquid detergent and liquid fabric softener into the washing tub W. However, the water supply device 70 may also be configured not to include a fabric softener tank 500 and not to automatically dispense liquid fabric softener.

[0115] Furthermore, in the above embodiment, the water supply device 70 functions as an automatic liquid agent dispenser. However, the water supply device and the automatic liquid agent dispenser may be provided separately.

[0116] Furthermore, in the above embodiment, the fully automatic washing machine 1 is provided with an ultrasonic cleaning device 50, and a connecting hose 81 and a supply nozzle 80 are provided for supplying cleaning water to the ultrasonic cleaning device 50. However, the fully automatic washing machine 1 may be configured without the ultrasonic cleaning device 50, the connecting hose 81, and the supply nozzle 80. In this case, the water supply device 70 is not provided with a third three-way valve 650 and a branch waterway 616.

[0117] Furthermore, the above embodiment shows a fully automatic washing machine 1. However, the present invention can also be applied to washing machines other than the fully automatic washing machine 1, for example, drum-type washing machines in which the washing tub is composed of an outer tub and a horizontal-axis type drum arranged inside the outer tub. The present invention can also be applied to fully automatic washer-dryers and drum-type washer-dryers that have a drying function.

[0118] In addition, the embodiments of the present invention can be modified in various ways as appropriate within the scope of the technical idea set forth in the claims. [Explanation of symbols]

[0119] 1. Fully automatic washing machine (washing machine) 10 cabinets 70. Water supply system (automatic liquid dispensing device) 400 detergent tank (liquid tank) 401 Inlet 403 Outlet 500 Fabric Softener Tank (Liquid Tank) 501 Inlet 503 Outlet 612 1st waterway (waterway) 621 First water supply valve (water supply valve) 632 Second water inlet (detergent inlet, liquid inlet) 642 Second water inlet (fabric softener inlet, liquid inlet) 660 pump 670 Waterway Filter 671 Filter body 671a Filter surface 672 Side part 673 mesh 686a Inner wall surface 710 Input Slot Filter 713 mesh 720 Outlet filter 724 mesh W Washing tub

Claims

1. The washing tub, which is located inside the casing and in which the laundry is washed, The system includes an automatic liquid dispenser for dispensing laundry detergent into the washing tub, The aforementioned automatic liquid dispensing device is A liquid tank in which the aforementioned liquid is stored, A water supply valve connected to the water tap, A water channel through which water from the water supply valve flows toward the washing tub, A liquid inlet is provided in the aforementioned waterway, to which the liquid tank is connected, A pump is positioned downstream of the liquid inlet in the waterway and draws the liquid from the liquid tank into the waterway through the liquid inlet. The water channel includes a water channel filter positioned between the liquid inlet and the pump in the water channel, A washing machine characterized by the following features.

2. In the washing machine according to claim 1, The automatic liquid dispensing device includes, as the liquid tank, a detergent tank for storing liquid detergent and a fabric softener tank for storing liquid fabric softener, and as the liquid inlet, a detergent inlet connected to the detergent tank and a fabric softener inlet connected to the fabric softener tank. The water channel filter is positioned between the downstream inlet of the detergent inlet and the fabric softener inlet and the pump. A washing machine characterized by the following features.

3. In the washing machine according to claim 1 or 2, The water channel filter includes a filter body having a filter surface with a mesh formed therein. Within the aforementioned waterway, the filter body is positioned such that the filter surface is inclined with respect to a plane perpendicular to the direction of water flow. A washing machine characterized by the following features.

4. In the washing machine according to claim 3, The waterway has a pair of inner wall surfaces that extend in the direction of water flow and face each other, The water channel filter has a pair of plate-shaped side portions on both sides of the filter body, the outer surface of which is in contact with the pair of inner wall surfaces. A washing machine characterized by the following features.

5. In the washing machine according to claim 1 or 2, The aforementioned liquid tank is An inlet into which the aforementioned liquid is introduced, The outlet from which the liquid is discharged includes, The liquid tank is provided with at least one of the following filters: an inlet filter that covers the inlet, and an outlet filter that covers the outlet. The channel filter has a mesh that is smaller than the mesh of at least one of the filters. A washing machine characterized by the following features.

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