Water circulation device, washing system

Abstract

The washing system (100) includes: a circulation path section (41) that forms a circulation path (R1) for water via the washing tub of the washing machine (1) and the water tank (21); a second pump (27) that is located on the circulation path (R1) downstream of the washing tub and upstream of the water tank (21) in the circulation direction (D1), so that water flows along the circulation direction (D1); a sixth water passage (31) that connects a first flow path extending from the washing tub along the circulation path (R1) to the second pump (27) and an external water source (200); and a switching valve (25) that switches the water supply to the water tank (21) between the washing tub and the water source (200).

Description

Technical Field

[0001] This disclosure relates to water circulation devices and washing systems. Background Technology

[0002] In order to reuse the drainage discharged from the washing machine in the washing machine, there is a known water tank for storing the drainage (for example, see Patent Document 1).

[0003] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2001-218997 Summary of the Invention The technical problem this disclosure aims to solve However, when washing is repeated in a washing system that reuses the drain water, the water level in the tank gradually decreases because the washed clothes take away moisture. Therefore, the water tank needs to be replenished periodically in this washing system.

[0004] The purpose of this disclosure is to provide a water circulation device and a washing system that can reduce the workload of replenishing water to a water tank.

[0005] Technical solutions for solving technical problems One aspect of the water circulation device disclosed herein includes a circulation path section and a water supply section. The circulation path section forms a circulation path for water via a washing machine and a water tank. The water supply section supplies water to the water tank.

[0006] Another aspect of the washing system disclosed herein includes the water circulation device and the washing machine. Beneficial effects According to this disclosure, the workload of replenishing water to the water tank can be reduced. Attached Figure Description

[0007] Figure 1 This is a diagram showing the configuration of the washing system according to the first embodiment of this disclosure.

[0008] Figure 2 This is a cross-sectional view showing the configuration of a washing machine according to the first embodiment of the present disclosure.

[0009] Figure 3 This is a block diagram illustrating the control system of the washing system according to the first embodiment of the present disclosure.

[0010] Figure 4 This is a flowchart illustrating an example of a water replenishment process performed by the washing system of the first embodiment of this disclosure.

[0011] Figure 5This is a flowchart illustrating an example of an emergency stop procedure performed by the washing system according to the first embodiment of this disclosure.

[0012] Figure 6 This is a diagram showing the configuration of the washing system according to the second embodiment of this disclosure.

[0013] Figure 7 This is a cross-sectional view showing the configuration of a washing machine according to the second embodiment of the present disclosure. Detailed Implementation

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Furthermore, the following embodiments are merely examples of embodiments of the present disclosure and do not limit the technical scope of the present disclosure.

[0015] <First Implementation Method> First, refer to Figure 1 The configuration of the washing system 100 according to the first embodiment of this disclosure will be explained. Furthermore, in Figure 1 In the diagram, the loop path R1 is represented by a dashed line.

[0016] Furthermore, in this disclosure, "washing machine" refers to all equipment that performs various treatments, such as washing, on clothes. Examples of treatments performed on clothes in a washing machine include washing, drying, deodorizing, and sterilizing. The clothes being washed are not particularly limited as long as they are made of raw materials suitable for washing with alkaline ionized water. Examples of clothes being washed include, for example, textiles. Examples of clothes being washed include, for example, clothing such as clothes, hats, and gloves; shoes, bags, handkerchiefs, and towels; interior decorations such as curtains and carpets; and bedding such as blankets, towels, and duvet covers.

[0017] The washing system 100 uses water with added detergents such as alkaline ionized water to wash clothes and other items. For example... Figure 1 As shown, the washing system 100 includes a washing machine 1 and a water circulation device 2.

[0018] [Components of Washing Machine 1] Next, refer to Figures 1 to 3 This explains the composition of washing machine 1.

[0019] like Figure 1 as well as Figure 2 As shown, the washing machine 1 includes: a frame 11, a door 12, a washing tub 13, a rotating drum 14, a motor 15, a water supply line 16, and a drain line 17. Additionally, the washing machine 1 includes... Figure 3 The drying unit 18, operation display unit 19, and control unit 20 are shown.

[0020] The various components of the washing machine 1 are housed within the frame 11. The frame 11 is generally rectangular in shape. Figure 2 As shown, an inclined surface is provided on the upper side of one side of the frame 11, which corresponds to the front of the washing machine 1, and slopes towards the upper surface of the frame 11. A circular opening 11A is provided on this inclined surface. The opening 11A is used to insert and remove laundry into the rotating drum 14 inside the frame 11. A water inlet 11B is provided on the rear side of the upper surface of the frame 11. The water inlet 11B connects to the first water passage 23 of the water circulation device 2 (see reference 2). Figure 1 The water inlet 11B is used to supply water to the washing tank 13 inside the frame 11. A drain outlet 11C is provided on the lower left side of the frame 11. The drain outlet 11C connects to the second water passage 24 of the water circulation device 2 (see reference). Figure 1 The drain outlet 11C is used to drain the water from the washing tub 13 inside the frame 11. Four legs 11D are provided on the bottom surface of the frame 11 (see reference). Figure 2 Four legs 11D are disposed at the four corners of the bottom surface of the frame 11. Alternatively, a drain outlet 11C may be located on the lower side of the right side or the bottom surface of the frame 11. Furthermore, the frame 11 may have five or more legs 11D.

[0021] The door 12 is configured to open and close the opening 11A. For example, the door 12 is formed in the shape of a disc. The door 12 is mounted to the opening 11A via a hinge (not shown) provided on either the left or right side of the opening 11A.

[0022] The washing tank 13 stores water used for washing. The washing tank 13 is formed as a cylinder open only on one axial direction. That is, the washing tank 13 has a circular opening 13A (see reference). Figure 2 ).like Figure 2 As shown, the washing tub 13 is fixedly disposed inside the frame 11 with its opening 13A facing the opening 11A of the frame 11. A water inlet 13B is provided on the upper side of the washing tub 13. The water inlet 13B is connected to the water inlet 11B of the frame 11 via a water supply passage 16. The water inlet 13B is used to supply water to the washing tub 13. A drain outlet 13C is provided on the lower side of the washing tub 13. The drain outlet 13C is connected to the drain outlet 11C of the frame 11 via a drain passage 17. The drain outlet 13C is used to drain the wastewater from the washing tub 13.

[0023] The washing material is contained in the rotating drum 14. The rotating drum 14 is formed as a cylinder that is open only on one axial direction. That is, the rotating drum 14 has a circular opening 14A (see reference). Figure 2 The radial dimension of the rotating drum 14 is smaller than that of the washing tub 13. For example... Figure 2As shown, the rotating drum 14 is arranged in a position where the opening 14A on the inner side of the washing tub 13 is opposite to the opening 11A of the frame 11. Furthermore, the rotating drum 14 is configured to rotate about its central axis (rotation axis) inside the washing tub 13. Multiple water passages (not shown) are provided on the side of the rotating drum 14 for supplying water stored in the washing tub 13 to the inner side of the rotating drum 14.

[0024] Washing machine 1 is a so-called tilting drum type washing machine in which the rotating drum 14 is tilted. Specifically, the rotating drum 14 is arranged in an orientation where its central axis is orthogonal to the tilting surface of the frame 11. Taking into account water-saving effect, washing power, ease of damage to the washed clothes, and ease of removing the washed clothes after washing, the tilt angle of the rotating drum 14 relative to the horizontal plane is set in the range of 5 degrees to 30 degrees. Furthermore, washing machine 1 is not limited to a so-called tilting drum type washing machine, but can also be a so-called horizontal (horizontal drum type) washing machine in which the central axis of the rotating drum 14 is horizontal.

[0025] Motor 15 supplies rotational driving force to rotating drum 14. Rotating drum 14 receives the rotational driving force supplied by motor 15 and rotates about the central axis. Figure 3 As shown, the motor 15 is connected to the control unit 20 and is driven and controlled by the control unit 20.

[0026] Water supply line 16 is the water supply line from water inlet 11B of frame 11 to water inlet 13B of washing tank 13. For example... Figure 2 As shown, the water supply circuit 16 is equipped with a water supply valve 16A and an ionized water supply unit 16B. The water supply valve 16A is a solenoid or electric valve that changes state between an open state (allowing water to pass through) and a closed state (preventing water to pass through). For example... Figure 3 As shown, the water supply valve 16A is connected to the control unit 20 and is driven and controlled by the control unit 20.

[0027] The ion water supply unit 16B generates alkaline ion water for washing and supplies it to the water supply line 16. Specifically, the ion water supply unit 16B generates alkaline ion water for washing by supplying a predetermined amount of raw alkaline ion water solution into the water supply line 16. For example, the ion water supply unit 16B includes a raw solution storage unit, a raw solution supply line, and a raw solution supply pump. The raw solution storage unit stores the raw alkaline ion water solution. For example, the raw alkaline ion water solution is alkaline ion water with a pH value of 12.5 or higher. The raw solution supply line is a water path for the raw alkaline ion water solution from the raw solution storage unit to the confluence with the water supply line 16. The raw solution supply pump is provided in the raw solution supply line, causing the raw alkaline ion water solution to flow along the raw solution supply line from the raw solution storage unit side to the water supply line 16 side. The raw solution supply pump and the control unit 20 (see reference) Figure 3The connection is controlled by the control unit 20. For example, when water is supplied to the water supply port 11B through the water circulation device 2 and the washing water is stored in the washing tank 13, the control unit 20 drives the stock solution supply pump to supply the water supply line 16 with a stock solution of alkaline ionized water in an amount that can make the pH value of the water stored in the washing tank 13 about 12.0.

[0028] Drainage path 17 is a water passage from the drain outlet 13C of the washing tank 13 to the drain outlet 11C of the frame 11. For example... Figure 2 As shown, a drain valve 17A and a drain filter 17B are installed on the drainage path 17. The drain valve 17A is a solenoid or electric valve that changes state between an open state (allowing water to pass) and a closed state (preventing water to pass). Figure 3 As shown, drain valve 17A is connected to control unit 20 and is driven and controlled by control unit 20. Drain filter 17B captures foreign objects such as lint contained in the water passing through drain passage 17.

[0029] Drying section 18 (refer to) Figure 3 The drying unit 18 dries the wet laundry inside the rotating drum 14. It includes: a circulating air path through the rotating drum 14; a fan that circulates air along the circulating air path; a heater that heats the air supplied to the rotating drum 14; and a heat exchanger that cools and dries the air that has passed through the rotating drum 14. The fan, the heater, and the heat exchanger are connected to the control unit 20 (see reference 1). Figure 3 The drive is controlled by the control unit 20.

[0030] Operation display unit 19 (see reference) Figure 3 This is the user interface of the washing system 100. The operation display unit 19 includes a display unit and an operation unit. The display unit displays various information according to control instructions from the control unit 20. For example, the display unit is a flat panel display such as an LCD. The operation unit inputs various information to the control unit 20 according to the user's operation. For example, the operation unit includes hard buttons and a touch panel.

[0031] Control Unit 20 (refer to) Figure 3 Unified control of the washing system 100. (e.g.) Figure 3As shown, the control unit 20 includes a CPU 20A, a ROM 20B, and a RAM 20C. The CPU 20A is a processor that performs various arithmetic operations. The ROM 20B is a non-volatile storage device that pre-stores information such as control programs for causing the CPU 20A to perform various operations; in other words, it is a recording medium that can be read by a computer. The RAM 20C is a volatile or non-volatile storage device used as temporary memory (working area) for the various operations performed by the CPU 20A. The CPU 20A executes various control programs pre-stored in the ROM 20B. Thus, the CPU 20A uniformly controls the washing system 100.

[0032] [Composition of water circulation device 2] Next, refer to Figure 1 and Figure 3 At the same time, the composition of the water circulation device 2 will be explained.

[0033] like Figure 1 As shown, the water circulation device 2 includes a water tank 21, a first pump 22, a first water path 23, a second water path 24, a switching valve 25, a third water path 26, a second pump 27, a fourth water path 28, a filter 29, a fifth water path 30, and a sixth water path 31. Additionally, the water circulation device 2 includes... Figure 3 The operation unit 32, the floating sensor 33, and the light sensor 34 are shown.

[0034] Water tank 21 stores water into washing tub 13 of washing machine 1 (see reference) Figure 2 The water supplied by the washing machine 1. Additionally, the water tank 21 stores the wastewater discharged from the washing tub 13 of the washing machine 1 for reuse in the washing machine 1. The water tank 21 is sized to store the amount of water required for the washing operation performed by the washing machine 1. The water tank 21 is located on the side, bottom, top, or inside of the washing machine 1. For example, the water tank 21 stores tap water.

[0035] However, in the washing system 100 that reuses the drainage from the washing tub 13, if washing is repeated, water will be carried away by the washed clothes, and the water storage in the water tank 21 will gradually decrease. Therefore, in the washing system 100, water needs to be replenished to the water tank 21 periodically.

[0036] In contrast, the washing system 100, as described below, can reduce the workload of replenishing water to the water tank 21.

[0037] Specifically, the washing system 100 includes a water supply unit 60 that supplies water to the water tank 21 (see reference). Figure 1 The water supply unit 60 has a second pump 27, a sixth water passage 31, and a switching valve 25.

[0038] like Figure 1As shown, the first pump 22 is located at the bottom of the water tank 21. The first pump 22 is a water pump with a built-in motor. The upper end of the first pump 22 is formed into a generally dome-shaped cylinder. The first pump 22 includes a water intake section for drawing water from the water tank 21, a filter section for filtering the drawn water, and a water delivery section 22A for delivering the water that has passed through the filter section to the outside (see reference). Figure 1 The water suction section is located on the outer periphery of the bottom of the first pump 22. The water delivery section 22A extends upward from the upper end of the first pump 22, and its extended end is connected to the first water passage 23. The first pump 22 directs water along a water supply path from the inside of the water tank 21 through the first pump 22 and the first water passage 23 to the water inlet 11B of the washing machine 1 (see reference). Figure 1 The water flows from the water tank 21 side to the washing machine 1 side. For example... Figure 3 As shown, the first pump 22 is connected to the control unit 20 and is driven and controlled by the control unit 20.

[0039] like Figure 1 As shown, the first water passage 23 is the water passage from the water delivery section 22A of the first pump 22 to the water supply port 11B of the washing machine 1. The first water passage 23 is formed by tubular components such as resin hoses.

[0040] like Figure 1 As shown, the second water passage 24 is the water passage from the drain outlet 11C of the washing machine 1 to the switching valve 25. The second water passage 24 is formed by tubular components such as resin hoses.

[0041] like Figure 1 As shown, the switching valve 25 is connected to the second water passage 24, the third water passage 26, and the sixth water passage 31. The switching valve 25 is a three-way valve used to switch the water passage connected to the third water passage 26 between the second water passage 24 and the sixth water passage 31. Furthermore, the switching valve 25 is an electric valve or a solenoid valve that operates based on power supply. Alternatively, the switching valve 25 can also be composed of two two-way valves respectively installed in the second water passage 24 and the sixth water passage 31. Additionally, the switching valve 25 can also be a manual valve.

[0042] like Figure 1 As shown, the third water passage 26 is the water passage from the switching valve 25 to the second pump 27. The third water passage 26 is formed by tubular components such as resin hoses.

[0043] The second pump 27 directs water along the drainage path from the drain outlet 11C of the washing machine 1 through the second water passage 24, the switching valve 25, the third water passage 26, the second pump 27, the fourth water passage 28, the filter 29, and the fifth water passage 30 to the water tank 21 (see reference). Figure 1 The water flows from the washing machine side 1 to the water tank side 21. (For example...) Figure 3As shown, the second pump 27 is connected to the control unit 20 and is driven and controlled by the control unit 20. The second pump 27 is an example of a preferred embodiment of the first pump of this disclosure.

[0044] like Figure 1 As shown, the fourth water passage 28 is the water passage from the second pump 27 to the filter 29. The fourth water passage 28 is formed by tubular components such as resin hoses.

[0045] Filter 29 purifies water flowing along the drainage path. For example, filter 29 has a double-layer structure having a first layer made of a non-woven fabric filter and a second layer made of an activated carbon filter. The first layer is positioned upstream of the water flow direction in the drainage path compared to the second layer. Alternatively, the second layer can be a hollow fiber membrane filter, a ceramic filter, a reverse osmosis membrane filter, or an ion exchange resin filter, etc. Furthermore, filter 29 can also be a single-layer structure or a multi-layer structure with three or more layers. When filter 29 is composed of a multi-layer structure with three or more layers, filter 29 can include multiple filters of different types. Filter 29 is an example of a preferred embodiment of the first filter disclosed herein.

[0046] like Figure 1 As shown, the fifth water passage 30 is the water passage from the filter 29 to the water tank 21. The fifth water passage 30 is formed by tubular components such as resin hoses. The end of the fifth water passage 30 on the water tank 21 side is positioned higher and lower than the water surface stored in the water tank 21.

[0047] Water tank 21, first pump 22, first water passage 23, second water passage 24, switching valve 25, third water passage 26, second pump 27, fourth water passage 28, filter 29, and fifth water passage 30 constitute circulation path section 41 (see reference). Figure 1 The circulation path section 41 forms a water circulation path R1 through the water tank 21 and the washing machine 1 (see reference). Figure 1 ).

[0048] Specifically, the circulation path R1 is the path from the water tank 21 through the first pump 22 and the first water passage 23, through the water supply passage 16, washing tub 13 and drain passage 17 in the washing machine 1, and then through the second water passage 24, switching valve 25, third water passage 26, second pump 27, fourth water passage 28, filter 29 and fifth water passage 30 to reach the water tank 21.

[0049] In the circulation path R1, water flows along the first pump 22 and the second pump 27. Figure 1 The water flows in the circulation direction D1 as shown. The second pump 27 is located on the upstream side of the circulation path R1, which is further downstream of the washing machine 1 and further upstream of the water tank 21 in the circulation direction D1, so that the water flows along the circulation direction D1.

[0050] like Figure 1 As shown, the sixth water path 31 is a water path from the external water source 200 to the switching valve 25. The sixth water path 31 is formed of a tubular component such as a resin hose. The sixth water path 31 is translucent. Specifically, the sixth water path 31 is formed of a transparent resin material. The sixth water path 31 is connected to the upstream portion of the circulation path R1 and to the external water source 200. Specifically, the sixth water path 31 connects the first flow path in the upstream portion, extending from the washing machine 1 along the circulation path R1 to the second pump 27, to the external water source 200. The first flow path consists of the washing machine 1's drain path 17, the second water path 24, the switching valve 25, and the third water path 26. The sixth water path 31 is an example of a preferred embodiment of the first external water supply flow path of this disclosure.

[0051] Water source 200 is used to replenish water to water tank 21. For example, water source 200 is a container such as a bucket filled with water for replenishment. In addition, water source 200 can also be a bathtub or pool filled with water. Furthermore, water source 200 can also be a river, lake, or pool.

[0052] In the water circulation device 2, a switching valve 25 is provided at the connection between the upstream side portion and the sixth water path 31 in the circulation path R1, and can switch between connecting the upstream side and the downstream side via the connection and connecting the downstream side and the flow path via the connection. That is, the switching valve 25 switches the water supply source to the water tank 21 between the washing tub 13 of the washing machine 1 and the water source 200.

[0053] Here, as Figure 1 As shown, filter 29 is disposed between the connection and water tank 21 in the circulation path R1. Therefore, water supplied from water source 200 to water tank 21 can be purified before reaching water tank 21.

[0054] The operating part 32 is located on the outer surface of the water tank 21. For example, the operating part 32 may be located on the top or side of the water tank 21. The operating part 32 includes a user-operated switch or button. Figure 3 As shown, the operation unit 32 is connected to the control unit 20. The operation unit 32 inputs operation receiving signals to the control unit 20 according to the user's operation.

[0055] like Figure 1 As shown, a float sensor 33 is disposed inside the water tank 21. The float sensor 33 detects that the water level in the water tank 21 is above a preset reference position. This reference position is set based on the water level in the water tank 21 when it contains the minimum amount of water required for the washing machine 1 to perform its washing operation. Figure 3As shown, the float sensor 33 is connected to the control unit 20. Based on the instruction from the control unit 20, the float sensor 33 inputs a first detection signal indicating whether the water level in the water tank 21 is above the reference position to the control unit 20.

[0056] like Figure 1 As shown, the light sensor 34 is disposed in the sixth water channel 31. For example, the light sensor 34 is a light-emitting part 34A that is disposed opposite to the transparent tubular sixth water channel 31 (see reference). Figure 1 ) and light-receiving part 34B (refer to Figure 1 A transmissive optical sensor 34 is used to detect foreign objects in the water supplied from the water source 200. Specifically, in the washing system 100, the presence of the foreign object is determined when the light emitted from the light-emitting unit 34A is blocked before it reaches the light-receiving unit 34B. Figure 3 As shown, the light sensor 34 is connected to the control unit 20. According to the instruction from the control unit 20, the light sensor 34 inputs a second detection signal indicating whether the light emitted from the light-emitting unit 34A is blocked (whether the foreign object is detected) to the control unit 20.

[0057] Furthermore, in the washing system 100, if the time for which the light emitted from the light-emitting unit 34A is interrupted exceeds a preset time, it can be determined that the presence of the foreign object is present. This allows small foreign objects to be excluded from the detection target. Additionally, in the washing system 100, it can also be determined that the presence of the foreign object is present if the amount of light received in the light-receiving unit 34B from the light-emitting unit 34A is below a preset reference value. This reference value is a value lower than the amount of light received in the light-receiving unit 34B from the light-emitting unit 34A when transparent water flows within the sixth water path 31. This allows the detection of translucent foreign objects such as plastic bag fragments. Furthermore, it also allows the detection of large quantities of small foreign objects that cause turbidity in the water source 200.

[0058] [Composition of Control Unit 20] Next, refer to Figure 1 and Figure 3 The structure of the control unit 20 will be explained.

[0059] like Figure 3 As shown, the control unit 20 includes a drive control unit 51, a judgment processing unit 52, and a detection processing unit 53.

[0060] Specifically, the ROM 20B of the control unit 20 stores in advance an action control program for enabling the control unit 20 to function as each of the aforementioned functional units. The CPU 20A of the control unit 20 reads the action control program from the ROM 20B and executes it, thereby enabling the control unit to function as each of the aforementioned functional units.

[0061] Furthermore, some or all of the functional units included in the control unit 20 may also be composed of electronic circuits. Additionally, the motion control program may be used to enable multiple processors as... Figure 3 The procedure for each functional unit to perform its function is shown.

[0062] The judgment and processing unit 52 determines whether the water level in the water tank 21 is above the reference position.

[0063] For example, the determination processing unit 52 uses the float sensor 33 to determine whether the water level in the water tank 21 is above the reference position. Alternatively, the determination processing unit 52 may use a different water level sensor than the float sensor 33 to determine whether the water level in the water tank 21 is above the reference position.

[0064] When the drive control unit 51 receives a specific operation that has been preset, it uses the switching valve 25 to switch the water supply source to the water tank 21 from the washing machine 1 to the water source 200, and drives the second pump 27.

[0065] For example, the specific operation is an operation of the operation unit 32. When the operation receiving signal is input from the operation unit 32, the drive control unit 51 uses the switching valve 25 to switch the water supply source to the water tank 21 from the washing tub 13 of the washing machine 1 to the water source 200, and drives the second pump 27. In addition, the specific operation may also be a preset operation in the operation display unit 19 of the washing machine 1.

[0066] Upon receiving the specific operation and meeting the preset stop conditions, the drive control unit 51 stops the drive of the second pump 27 and uses the switching valve 25 to switch the water supply to the water tank 21 from the water source 200 to the washing machine 1.

[0067] For example, the stop condition is determined by the judgment processing unit 52 as the water level in the water tank 21 being above the reference position. Alternatively, the stop condition may be a pre-set replenishment period elapsed since the specific operation was received. For example, the replenishment period can be set based on the time from the start of driving the second pump 27 until the replenished water volume in the water tank 21 reaches the minimum water volume required for the washing operation. Alternatively, the stop condition may be one of the two conditions specified by the user's operation on the operation display unit 19 of the washing machine 1. Alternatively, the stop condition may be receiving the specific operation again.

[0068] The detection and processing unit 53 detects the foreign matter contained in the water supplied from the water source 200.

[0069] Specifically, the detection processing unit 53 uses the light sensor 34 to detect the foreign object. Alternatively, the detection processing unit 53 may also use a camera capable of capturing images of the sixth waterway 31 from the outside to detect the foreign object.

[0070] Here, when the detection and processing unit 53 detects the foreign object, the drive control unit 51 stops the drive of the second pump 27 regardless of whether the stop condition is met. This prevents the second pump 27 from malfunctioning due to the foreign object entering it. Furthermore, it prevents the filter 29 from breaking due to the foreign object entering it.

[0071] [Water supply treatment] The following is for reference Figure 4 An example of the sequence of water replenishment processes performed by the control unit 20 in the washing system 100 will be described. Here, steps S11, S12... denote the numbers of the processing steps performed by the control unit 20.

[0072] <Step S11> First, in step S11, the control unit 20 determines whether the specific operation has been received.

[0073] Specifically, when the operation receiving signal is input from the operation unit 32, the control unit 20 determines that the specific operation has been received.

[0074] Here, when the control unit 20 determines that the specific operation has been received (S11 "Yes" side), the processing is transferred to step S12. Furthermore, if the specific operation has not been received (S11 "No" side), the control unit 20 waits in step S11 for the specific operation to be received.

[0075] <Step S12> In step S12, the control unit 20 uses the switching valve 25 to switch the water supply to the water tank 21 from the washing tub 13 of the washing machine 1 to the water source 200.

[0076] <Step S13> In step S13, the control unit 20 starts driving the second pump 27. Here, the processing of steps S12 and S13 is performed by the drive control unit 51 of the control unit 20.

[0077] <Step S14> In step S14, the control unit 20 determines whether the foreign object has been detected.

[0078] Specifically, the control unit 20 outputs a second detection signal to the light sensor 34. Furthermore, when the light sensor 34 outputs the second detection signal indicating the detection of the foreign object, the control unit 20 determines that the foreign object has been detected. Here, the detection processing unit 53 of the control unit 20 performs the processing for detecting the foreign object.

[0079] Here, when the control unit 20 determines that the foreign object has been detected (S14 "Yes" side), the process proceeds to step S15. Furthermore, if the foreign object is not detected (S14 "No" side), the control unit 20 proceeds to step S16.

[0080] <Step S15> In step S15, the control unit 20 performs the emergency stop process described later.

[0081] <Step S16> In step S16, the control unit 20 determines whether the stop condition is met.

[0082] Specifically, the control unit 20 outputs a first detection signal to the float sensor 33 at a preset period. Then, when the float sensor 33 outputs the first detection signal indicating that the water level in the water tank 21 is above the reference position, the control unit 20 determines that the stop condition has been met. The period is, for example, arbitrarily set between 0.1 seconds and 10 seconds. Here, the determination processing unit 52 of the control unit 20 performs the process of determining whether the water level in the water tank 21 is above the reference position.

[0083] Here, when it is determined that the stopping condition is met (S16 "Yes" side), the control unit 20 transfers the process to step S17. Furthermore, if the stopping condition is not met (S16 "No" side), the control unit 20 transfers the process to step S14.

[0084] <Step S17> In step S17, the control unit 20 stops the drive of the second pump 27.

[0085] <Step S18> In step S18, the control unit 20 uses the switching valve 25 to switch the water supply to the water tank 21 from the water source 200 to the washing tub 13 of the washing machine 1. Here, the processing of steps S17 and S18 is performed by the drive control unit 51 of the control unit 20.

[0086] [Emergency Stop Procedure] Next, refer to Figure 5 An example of the emergency stop procedure performed in step S15 of the water replenishment process will be described.

[0087] <Step S21> First, in step S21, the control unit 20 stops the drive of the second pump 27.

[0088] Here, the processing of step S21 is performed by the drive control unit 51 of the control unit 20.

[0089] <Step S22> In step S22, the control unit 20 reports that the foreign object has been detected.

[0090] For example, the control unit 20 causes the operation display unit 19 of the washing machine 1 to display a message indicating that water supply to the water tank 21 has stopped due to the detection of the foreign object in the sixth water channel 31, that the water source 200 needs to be changed, and that water supply to the water tank 21 can be resumed after the water source 200 is changed by operating the operation unit 32. Alternatively, the control unit 20 may display the message in place of the message itself, or may sound a preset warning sound along with the message display.

[0091] <Step S23> In step S23, the control unit 20 determines whether the specific operation has been received.

[0092] Here, when the control unit 20 determines that the specific operation has been received (S23 "Yes" side), the processing is transferred to step S24. Furthermore, if the specific operation has not been received (S23 "No" side), the control unit 20 waits in step S23 for the specific operation to be received.

[0093] <Step S24> In step S24, the control unit 20 restarts the drive of the second pump 27.

[0094] Thus, the washing system 100 includes: a sixth water path 31, which connects to an external water source 200 via the first flow path extending from the washing tub 13 of the washing machine 1 along the circulation path R1 to the second pump 27; and a switching valve 25, which switches the water supply to the water tank 21 between the washing tub 13 and the water source 200. Therefore, the second pump 27 can be used to replenish water to the water tank 21. Consequently, the workload of replenishing water to the water tank 21 can be reduced in the washing system 100.

[0095] Furthermore, the washing system 100 includes a drive control unit 51, which, upon receiving the specific operation, uses a switching valve 25 to switch the water supply source to the water tank 21 from the washing tub 13 to the water source 200 and drives the second pump 27. Therefore, compared to a configuration requiring separate operations for switching the state of the switching valve 25 and for driving the second pump 27, the number of user operations required to replenish water from the water source 200 to the water tank 21 can be reduced.

[0096] Furthermore, in the washing system 100, when the aforementioned stop condition is met, the drive of the second pump 27 is stopped, and the water supply to the water tank 21 is switched from the water source 200 to the washing tub 13 using the switching valve 25. Therefore, compared to a configuration where the drive of the second pump 27 stops but the water supply to the water tank 21 is not switched when the aforementioned stop condition is met, it is possible to prevent the user from forgetting to switch the water supply to the water tank 21.

[0097] Furthermore, in the washing system 100, if the determination processing unit 52 determines that the water level in the water tank 21 is above the reference position, it determines that the stop condition has been met. Therefore, the replenishment of water to the water tank 21 can be automatically stopped when a predetermined amount of water has been stored in the water tank 21.

[0098] [Variation Example] Furthermore, the drive control unit 51, the judgment processing unit 52, and the detection processing unit 53 may not be installed in the washing machine 1, but rather in the water circulation device 2. That is, the water circulation device 2 may also have a control unit that functions as the drive control unit 51, the judgment processing unit 52, and the detection processing unit 53.

[0099] Alternatively, the filter 29 can be installed on the circulation path R1 downstream of the switching valve 25 in the circulation direction D1 and upstream of the second pump 27 in the circulation direction D1. Alternatively, the filter 29 can be installed on the circulation path R1 downstream of the water tank 21 in the circulation direction D1 and upstream of the washing machine 1 in the circulation direction D1.

[0100] Furthermore, the water stored in tank 21 is not limited to tap water; it can also be rainwater, river water, lake water, or pond water. For example, if the washing system 100 is used in a disaster-stricken area where tap water is unavailable, rainwater, river water, lake water, or pond water can be stored in tank 21. Thus, even in places where tap water is unavailable, the items being washed can be cleaned.

[0101] In addition, washing machine 1 is not limited to the so-called drum washing machine, but can also be the so-called upright washing machine.

[0102] Alternatively, the washing system 100 may not include an ionized water supply unit 16B. That is, the washing system 100 may also use neutral water to wash (perform a water wash) the items being washed.

[0103] In addition, the water circulation device 2 can also be used in systems different from washing systems, such as bathing systems that include bathing devices.

[0104] Additionally, the washing system 100 may include a neutralization section. This neutralization section neutralizes the alkaline ionized water used in the washing process by supplying a predetermined amount of acidic water to the wastewater. For example, the neutralization section is connected to the upstream portion of the circulation path R1. For example, the neutralization section includes an acidic water storage section, an acidic water supply path, and an acidic water supply pump. The acidic water storage section stores acidic water with a pH value of 4.0 or lower. The acidic water supply path is a water path for acidic water from the acidic water storage section to the confluence of the upstream portion. The acidic water supply pump is installed in the acidic water supply path, causing the acidic water to flow along the acidic water supply path from the acidic water storage section side to the upstream portion side. The acidic water supply pump and control unit 20 (see reference) Figure 3 The connection is made and driven by the control unit 20. For example, the water used for washing is returned to the water tank 21 of the water circulation device 2 (see reference). Figure 1 In the event of a certain condition, the control unit 20 drives the acidic water supply pump to supply an amount of acidic water to the upstream portion, which is sufficient to maintain the pH value of the water in the water tank 21 at approximately 7.0. This allows the water in the water tank 21 to be maintained at a neutral pH.

[0105] <Second Implementation Method> Next, refer to Figure 6 and Figure 7 This section describes the configuration of the washing system 100 according to the second embodiment of this disclosure.

[0106] like Figure 6 and Figure 7 As shown, in the washing system 100 of the second embodiment, the ion water supply unit 16B is provided outside the washing machine 1.

[0107] In addition, such as Figure 6 As shown, the washing system 100 of the second embodiment has a water supply unit 70 instead of a water supply unit 60 (see reference). Figure 1 Specifically, the washing system 100 of the second embodiment includes... Figure 6 The seventh water channel 71, the third pump 72, and the filter 73 shown are used to replace Figure 1 The sixth waterway 31 and the switching valve 25 are shown.

[0108] In addition, such as Figure 6As shown, in the washing system 100 of the second embodiment, the configuration position of the light sensor 34 is different from that of the first embodiment.

[0109] Furthermore, in the washing system 100 of the second embodiment, the drive control unit 51 (see reference) Figure 3 The processing of this method differs from that of the first implementation method.

[0110] Furthermore, the other configurations are common to both the first and second embodiments. Hereinafter, only the configurations in the second embodiment that differ from those in the first embodiment will be described.

[0111] Figure 6 The ionized water supply unit 16B shown generates alkaline ionized water for washing by supplying a predetermined amount of raw alkaline ionized water to the water tank 21. For example... Figure 6 As shown, the ionized water supply unit 16B includes a stock solution storage unit 16B1, a stock solution supply path 16B2, and a stock solution supply pump 16B3. The stock solution storage unit 16B1 stores the stock solution of alkaline ionized water. The stock solution supply path 16B2 is a water path for the stock solution of alkaline ionized water from the stock solution storage unit 16B1 to the water tank 21. The stock solution supply pump 16B3 is installed in the stock solution supply path 16B2, causing the alkaline ionized water stock solution to flow along the stock solution supply path 16B2 from the stock solution storage unit 16B1 side to the water tank 21 side. The stock solution supply pump 16B3 and the control unit 20 (see reference) Figure 3 The system is connected to the control unit 20 and driven by the control unit 20. For example, when water discharged from the washing machine 1 is supplied to the water tank 21, the control unit 20 drives the stock solution supply pump 16B3 to supply a quantity of alkaline ionized water stock solution with a pH value set to a predetermined value (e.g., approximately 11.0) to the water tank 21. For example, the control unit 20 uses a pH sensor (not shown) that can detect the pH value of the water in the water tank 21 to control the amount of alkaline ionized water stock solution supplied to the water tank 21. In addition, when water is supplied to the water tank 21 through the water supply unit 70, the control unit 20 drives the stock solution supply pump 16B3 to supply alkaline ionized water stock solution to the water tank 21.

[0112] Water supply unit 70 supplies water to water tank 21. Water supply unit 70 has a seventh water channel 71, a third pump 72, and a filter 73.

[0113] like Figure 6 As shown, the seventh water passage 71 is a water passage from the external water source 200 to the water tank 21. The seventh water passage 71 is formed of a tubular component such as a resin hose. The seventh water passage 71 is translucent. Specifically, the seventh water passage 71 is formed of a transparent resin material. The seventh water passage 71 is connected to the external water source 200 and to the water tank 21. The seventh water passage 71 is an example of a preferred embodiment of the second external water supply path of this disclosure.

[0114] like Figure 6 As shown, a third pump 72 is located at one end of the seventh water passage 71 on the side of the water source 200. The third pump 72 is a water pump with a built-in motor. The upper end of the third pump 72 is formed into a generally dome-shaped cylinder. The third pump 72 has a suction section for drawing water from the water source 200 and a delivery section for discharging the water drawn in by the suction section to the outside. The suction section is located on the outer periphery of the bottom of the third pump 72. The delivery section extends upward from the upper end of the third pump 72, and its extended end is connected to one end of the seventh water passage 71. The third pump 72 causes water to flow along the seventh water passage 71 from the water source 200 side to the water tank 21 side. The third pump 72 is connected to a control unit 20 and is driven and controlled by the control unit 20. The third pump 72 is an example of a preferred embodiment of the second pump of this disclosure.

[0115] A filter 73 is disposed in the suction section of the third pump 72. The filter 73 filters the water drawn into the suction section. For example, the filter 73 is made of non-woven fabric. The filter 73 is an example of a preferred embodiment of the second filter of this disclosure. Alternatively, the filter 73 may be the same as the filter 29.

[0116] like Figure 6 As shown, the optical sensor 34 is located in the seventh water channel 71. The optical sensor 34 is used to detect foreign objects contained in the water supplied from the water source 200.

[0117] Upon receiving the specific operation, the drive control unit 51 drives the third pump 72.

[0118] In the second embodiment, a third pump 72 is used instead of the second pump 27 to supply water to the water tank 21. Therefore, in the second embodiment, water supply to the water tank 21 can be performed regardless of the operating state of the washing machine 1.

[0119] Furthermore, the drive control unit 51 can automatically drive the third pump 72 if the determination processing unit 52 determines that the water level in the water tank 21 is insufficient to the reference position. In this case, the drive control unit 51 only needs to drive the third pump 72 to supply a predetermined amount of water to the water tank 21. In other words, the drive control unit 51 can control the driving of the third pump 72 based on the determination result of the determination processing unit 52 to keep the water level in the water tank 21 within a predetermined range including the reference position.

[0120] Thus, in the washing system 100 of the second embodiment, the water supply unit 70 performs the water supply to the water tank 21. Therefore, compared with the case where the user of the washing system 100 takes water from a bucket or the like and supplies it to the water tank 21, the workload of replenishing water to the water tank 21 can be reduced.

[0121] <Notes on the Invention> Hereinafter, a summary of the invention extracted from the above embodiments will be provided. Furthermore, the various components and processing functions described in the following notes can be selected and combined arbitrarily.

[0122] <Postscript 1> A water circulation device includes: a circulation path section that forms a circulation path for water through a washing machine and a water tank; and a water supply section that supplies water to the water tank.

[0123] <Appendix 2> According to the water circulation device described in Appendix 1, the water supply unit includes: a first pump disposed in the circulation path on an upstream side portion that is further downstream of the washing machine in the circulation direction and further upstream of the water tank in the circulation direction, causing the water to flow in the circulation direction; a first external water supply path connected to the upstream side portion and connected to an external water source; and a valve disposed at the connection portion between the upstream side portion and the first external water supply path, the valve being switchable between a state where the connection portion connects the upstream side and the downstream side and a state where the connection portion connects the downstream side and the first external water supply path.

[0124] <Appendix 3> According to Appendix 2, the water circulation device further includes a first filter disposed between the connection portion and the water tank in the circulation path.

[0125] <Appendix 4> According to Appendix 2 or 3, the water circulation device is operated by a power supply, and the water circulation device also includes a drive control unit that, upon receiving a pre-set specific operation, uses the valve to switch the water supply source to the water tank from the washing machine to the water source to drive the first pump.

[0126] <Appendix 5> According to the water circulation device described in Appendix 4, when the predetermined stop condition is met after receiving the specific operation, the drive control unit stops the drive of the first pump and uses the valve to switch the water supply source to the water tank from the water source to the washing machine.

[0127] <Appendix 6> According to Appendix 5, the water circulation device further includes a judgment processing unit, which judges whether the water level in the water tank is above a preset reference position, and the stopping condition includes the judgment processing unit judging that the water level in the water tank is above the reference position.

[0128] <Appendix 7> According to the water circulation device described in Appendix 5 or 6, the stopping condition includes a pre-set replenishment period elapsed from the time the specific operation is received.

[0129] <Appendix 8> According to any one of Appendices 5 to 7, the water circulation device further comprises a detection and processing unit that detects foreign matter contained in the water supplied from the water source, and if the foreign matter is detected by the detection and processing unit, the drive control unit stops the drive of the first pump regardless of whether the stop condition is met.

[0130] <Appendix 9> According to Appendix 1, the water circulation device has: a second external water supply path connected to the water tank and connected to an external water source; and a second pump disposed in the second external water supply path to cause the water to flow toward the water tank.

[0131] <Postscript 10> According to Appendix 9, the water circulation device further includes a second filter disposed in the suction section of the second pump.

[0132] <Postscript 11> A washing system comprising: a water circulation device as described in any one of Appendices 1 to 10; and the washing machine.

Claims

1. A water circulation device, characterized by, It has: a circulation path portion that forms a circulation path of water via a washing machine and a water tank; and a water supply portion that supplies water to the water tank.

2. The water circulation device according to claim 1, wherein the water supply portion has: a first pump that is provided in an upstream side portion of the circulation path that is on a downstream side of the circulation direction of the water with respect to the washing machine and on an upstream side of the circulation direction with respect to the water tank, and that causes the water to flow in the circulation direction; a first external water supply flow path that is connected to the upstream side portion and that is connected to an external water source; a valve that is provided at a connection portion of the upstream side portion and the first external water supply flow path, and that is switchable between a state in which the upstream side and the downstream side are connected by the connection portion and a state in which the downstream side and the first external water supply flow path are connected by the connection portion.

3. The water circulation device according to claim 2, wherein the water circulation device further has a first filter that is provided between the connection portion and the water tank in the circulation path.

4. The water circulation device according to claim 2, wherein the valve operates in accordance with power supply, the water circulation device further has a drive control portion that, in a case where a predetermined specific operation is received, drives the first pump using the valve to switch a water supply source to the water tank from the washing machine to the water source.

5. The water circulation device according to claim 4, wherein in a case where a predetermined stop condition is satisfied after the specific operation is received, the drive control portion stops the drive of the first pump, and switches the water supply source to the water tank from the water source to the washing machine using the valve.

6. The water circulation device according to claim 5, wherein the water circulation device further includes a judgment processing portion that judges whether or not a water level of the water tank is above a predetermined reference position, the stop condition includes a case where the judgment processing portion judges that the water level of the water tank is above the reference position.

7. The water circulation device according to claim 5 or 6, wherein the stop condition includes a case where a predetermined replenishment period elapses from when the specific operation is received.

8. The water circulation device according to claim 5, wherein the water circulation device further has a detection processing portion that detects a foreign matter contained in the water supplied from the water source, in a case where the foreign matter is detected by the detection processing portion, the drive control portion stops the drive of the first pump regardless of whether or not the stop condition is satisfied.

9. The water circulation device according to claim 1, wherein the water supply portion has: a second external water supply flow path that is connected to the water tank and that is connected to an external water source; and a second pump that is provided in the second external water supply flow path and that causes the water to flow toward the water tank side.

10. The water circulation device according to claim 9, wherein the water circulation device further includes a second filter that is provided in a water suction portion of the second pump. It has:

11. A washing system characterized by, ​ The water circulating device of claim 1; and The washing machine.

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