Washing machine and washing system

Abstract

To provide a washing machine capable of improving the effect of a treatment agent supplied.SOLUTION: A washing machine according to the present disclosure includes: a washing tub capable of accommodating laundry; a water supply device for supplying water to the washing tub; a treatment agent supply device for supplying a first treatment agent or a second treatment agent to the washing tub; and a control part. The control part executes: a first washing process of causing the treatment agent supply device to supply the first treatment agent, causing the water supply device to supply water, and performing washing operation with water containing the first treatment agent; and a second washing process of, after the first washing process, causing the treatment agent supply device to supply the second treatment agent, and performing washing operation with water containing the first treatment agent and the second treatment agent.SELECTED DRAWING: Figure 7

Description

[Technical Field]

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

[0002] For example, Patent Document 1 discloses a washing machine that can perform optimal washing in accordance with the level of soiling of the laundry and the temperature of the washing water.

[0003] The washing machine described in Patent Document 1 includes a drum, an automatic detergent dispenser, and a dirt detector. The dirt level of the laundry is determined based on a signal from the dirt detector, and if the dirt level is equal to or greater than a predetermined value, additional detergent is dispensed and the washing time is extended. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-122015 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the washing machine described in Patent Document 1, the effects of the treatment agent containing the auxiliary agent are neither disclosed nor suggested.

[0006] Therefore, an object of the present disclosure is to solve the above problems and to provide a washing machine that improves the effect of the treatment agent supplied. [Means for solving the problem]

[0007] A washing machine according to one embodiment of the present disclosure includes a washing tub configured to accommodate laundry, a water supply device that supplies water to the washing tub, a treatment agent supply device that supplies a first treatment agent or a second treatment agent to the washing tub, and a control unit. The control unit executes a first washing step in which the treatment agent supply device supplies the first treatment agent, the water supply device supplies water, and a washing operation is performed using water containing the first treatment agent, and after the first washing step, the control unit executes a second washing step in which the treatment agent supply device supplies the second treatment agent, and a washing operation is performed using water containing the first treatment agent and the second treatment agent.

[0008] A laundry system according to one aspect of the present disclosure includes a washing machine and a processing device that communicates with the washing machine via a network. The washing machine includes a washing tub configured to accommodate laundry, a water supply device that supplies water to the washing tub, a processing agent supply device that supplies a first processing agent or a second processing agent to the washing tub, a control unit that executes a washing course, and a first communication unit that receives operating conditions for the washing course via the network. The processing device includes a processing unit that stores the operating conditions for the washing course and a second communication unit that transmits the operating conditions for the washing course via the network. The washing course includes a first washing step in which the processing agent supply device supplies the first processing agent, the water supply device supplies water, and a washing operation is performed using water containing the first processing agent, and a second washing step in which, after the first washing step, the processing agent supply device supplies the second processing agent, and a washing operation is performed using water containing the first processing agent and the second processing agent. [Effects of the Invention]

[0009] According to the present disclosure, a washing machine that improves the effect of the treatment agent supplied can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] Schematic front view of a washing machine according to a first embodiment of the present disclosure. [Figure 2] Schematic cross-section of a washing machine [Figure 3] A perspective view of an automatic insertion unit and a manual insertion case. [Figure 4] Schematic diagram of automatic feeding unit and manual feeding case [Figure 5]Flowchart of the first cycle of a washing machine [Figure 6] Flowchart of the main washing process [Figure 7] Pre-washing process flowchart [Figure 8] A diagram showing the operation in the pre-washing process [Figure 9] Flowchart of the main washing process [Figure 10] FIG. 10 is a diagram showing the operation in the pre-washing step according to the first modified example. [Figure 11] Flowchart of the first course of the washing machine according to the second modification [Figure 12] Block diagram of a laundry system according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] (Embodiment 1) A washing machine 1 according to a first embodiment of the present disclosure will be described.

[0012] Fig. 1 is a schematic front view of a washing machine 1 according to a first embodiment of the present disclosure, and Fig. 2 is a schematic cross-sectional view of the washing machine 1.

[0013] The washing machine 1 according to the first embodiment is a drum-type washing machine having a washing function. The washing machine 1 may further have a drying function. As shown in FIG. 1, the washing machine 1 includes a housing 2, an outer tub 3, a drum 4, a drive unit 5 (FIG. 2), a water supply valve 10, a drain valve 11, a water level sensor 12, a circulation flow path 13, a circulation pump 14, a laundry amount detection unit 15 (FIG. 2), a control unit 16, and an operation unit 17.

[0014] Washing machine 1 further includes an automatic dispensing unit 6, a manual dispensing case 7, and a connecting flow path 8, and supplies a treatment agent to outer tub 3. The treatment agent is used when treating clothes, towels, sheets, etc. in washing machine 1. The treatment agent in embodiment 1 is in liquid form. Note that the treatment agent is not limited to liquid form and may be a solid treatment agent such as a tablet.

[0015] The housing 2 is a member that forms the exterior of the washing machine 1. As shown in Fig. 2, an opening 20 and a door 21 that covers the opening 20 and can be opened and closed are provided on the front surface of the housing 2.

[0016] The outer tub 3 is a generally cylindrical member provided inside the housing 2 and functions to store wash water. The outer tub 3 may also be called a water tub or a tub. The outer tub 3 is provided in an opening 31 at a position facing the opening 20 of the housing 2, and the edge of the opening 31 is connected to the opening 20 by a bellows 32. The axis passing through the center of the bottom of the outer tub 3 is defined as a central axis V0. The outer tub 3 is disposed at an angle such that the central axis V0 is at an angle with respect to the horizontal.

[0017] The drum 4 is a generally cylindrical member that is rotatable around a central axis V0 inside the outer tub 3 and can accommodate laundry. The drum 4 may also be referred to as a washing tub, an inner tub, or a storage tub. The drum 4 has a number of through-holes 40 that connect the drum 4 to the outer tub 3. The drum 4 has an opening 41 at a position facing the opening 20 in the housing 2 and the opening 31 in the outer tub 3. When the user opens the door 21, they can place laundry into the drum 4 through the openings 20, 31, and 41.

[0018] The driving unit 5 is a member that drives the drum 4 to rotate around the central axis V0. The driving unit 5 has, for example, a motor that rotates the drum 4.

[0019] The automatic dosing unit 6 is a device that automatically dispenses a predetermined amount of treatment agent from a tank that stores multiple doses of treatment agent into the outer tub 3. The predetermined amount of treatment agent in the automatic dosing unit 6 is an appropriate amount and type of treatment agent determined by the control unit 16 in accordance with, for example, the amount of water supply or user input.

[0020] The treatment agent supplied to the outer tub 3 from the tank of the automatic dispenser 6 includes a main cleaning agent (second cleaning agent) and an auxiliary agent (first cleaning agent). The main cleaning agent is a cleaning agent for removing ordinary stains and is supplied to the outer tub 3 during the main wash cycle. The main cleaning agent is a cleaning agent that removes stains by penetrating, wetting, emulsifying, solubilizing, dispersing, or other actions. In the first embodiment, the main cleaning agent is a detergent that disperses stains. The auxiliary agent is a cleaning agent that enhances the effectiveness of the main cleaning agent and is supplied to the outer tub 3 during the pre-wash cycle performed before the main wash cycle. In the first embodiment, the auxiliary agent is a cleaning agent that exerts its effect by penetrating into the laundry or an agent that exerts its effect by dispersing in the wash liquid. Specifically, the auxiliary agent is a fiber protector for preventing pilling or shrinkage, a dye transfer inhibitor, a redeposition inhibitor, a bleach, a fragrance, a water softener, an alkali, or an enzyme or surfactant that disperses or alters stains. In other words, the main detergent and auxiliary agents are processing agents with different roles, such as further enhancing basic performance such as cleaning or adding new performance.

[0021] By performing a pre-wash process before the main wash process, it is possible to improve the processing capacity of laundry. For example, it is possible to increase the cleaning power of the main detergent to more reliably remove dirt from laundry, reduce the hardness of the water to prevent a decrease in cleaning power, suppress the occurrence of pilling and fuzzing during washing and fiber shrinkage, and prevent the re-adhesion of dirt that has been removed once. The pre-wash process is performed in conjunction with the main wash process, for example, to remove stubborn stains on collars and sleeves that require pre-washing treatment before washing, such as food spills, or to prevent pilling and fuzzing from occurring on clothes in processes after the main wash process.

[0022] The manual dispensing case 7 is a container into which the user manually dispenses a single dose of the treatment agent each time the washing machine 1 is operated. The manually dispensed treatment agent is supplied to the outer tub 3 in the dispensed amount.

[0023] The connection flow path 8 connects the automatic dosing unit 6 and the manual dosing case 7 to the outer tub 3. Therefore, water and the treatment agent flow from the automatic dosing unit 6 or the manual dosing case 7 into the outer tub 3 through the connection flow path 8. Because the automatic dosing unit 6 and the manual dosing case 7 are disposed above the outer tub 3, the connection flow path 8 extends downward.

[0024] The water supply valve 10 is an openable / closable valve connected to a water faucet via an external hose, and when opened, supplies water to the outer tub 3 and the drum 4. Alternatively, instead of the water supply valve 10, another water supply device for supplying water to the outer tub 3 and the drum 4 may be provided.

[0025] The drain valve 11 is a valve that can be opened and closed, and when opened, the water stored in the outer tub 3 is drained to the outside of the outer tub 3. The drain valve 11 is provided below the outer tub 3. Alternatively, instead of the drain valve 11, another drain device for draining water from the drum 4 may be provided.

[0026] The water level sensor 12 is provided in the outer tub 3 and detects the water level in the outer tub 3.

[0027] Returning to FIG. 1 , the circulation flow path 13 is provided inside the housing 2 and connected to the outer tub 3. Specifically, both the suction port 13a and the discharge port 13b of the circulation flow path 13 are connected to the outer tub 3, and circulate the water inside the drum 4. The suction port 13a is connected to the lower part of the outer tub 3, and the discharge port 13b is connected to the upper part of the outer tub 3. The circulation flow path 13 is connected to the drum 4 via the outer tub 3.

[0028] The circulation pump 14 is provided in the circulation flow path 13 and has a pump that generates a water flow in the circulation flow path 13. The circulation pump 14 generates a water flow from the suction port 13a toward the discharge port 13b.

[0029] 2, laundry amount detection unit 15 has a sensor that detects the amount of laundry accommodated in drum 4. Laundry amount detection unit 15 has, for example, a sensor that measures the weight of the laundry. Specifically, laundry amount detection unit 15 has a sensor that measures the voltage applied to the motor of drive unit 5 and a control circuit that converts the measured voltage into torque applied to drive unit 5 when drive unit 5 rotates and calculates the weight of the laundry based on the torque. Alternatively, laundry amount detection unit 15 may be included in control unit 16.

[0030] Control unit 16 is a controller that controls washing machine 1. Control unit 16 controls components of washing machine 1 such as drive unit 5, automatic dosing unit 6, water supply valve 10, drain valve 11, circulation pump 14, and operation unit 17. Control unit 16 includes a general-purpose processor such as a CPU, MPU, FPGA, DSP, or ASIC that executes a program to realize predetermined functions. Control unit 16 can realize various controls of washing machine 1 by calling and executing control programs stored in memory 16a. Control unit 16 is not limited to a controller that realizes predetermined functions through cooperation between hardware and software, and may be a hardware circuit designed specifically to realize predetermined functions.

[0031] The memory 16a is a recording medium that records various information and control programs, and may also be a memory that functions as a work area for the control unit 16. The memory 16a is realized by, for example, a flash memory, an SSD (Solid State Device), a hard disk, a RAM, other storage devices, or an appropriate combination of these.

[0032] The memory 16a stores the operating conditions for the washing courses, i.e., the pre-washing process, the main washing process, the rinsing process, and the spin-drying process, executed by the washing machine 1. Specifically, the memory 16a stores the operating conditions for the drive unit 5, the operating conditions for the automatic dosing unit 6, the opening / closing conditions for the water supply valve 10, the opening / closing conditions for the drain valve 11, and the operating conditions for the circulation pump 14, for each process.

[0033] The memory 16a further stores information about the processing agent. Specifically, the memory 16a stores the type of processing agent contained in the automatic dispensing unit 6.

[0034] Operation unit 17 is the part of washing machine 1 that is operated by the user. Operation unit 17 may be configured with one or more buttons, or may be configured with a liquid crystal touch panel. Operation unit 17 includes a start button or a display that functions as a start button. Control unit 16 controls washing machine 1 in response to operations on operation unit 17.

[0035] The user can set information about the washing course to be executed by the washing machine 1 via the operation unit 17. Specifically, the user can set the type of washing course to be executed by the washing machine 1. If the user wants to execute a washing course under conditions different from those stored in the memory 16a, the user can manually input and set the operating conditions of the washing course. Furthermore, the user can set the type of treatment agent by inputting the type of treatment agent contained in the automatic dispensing unit 6 via the operation unit 17. The user may set the type of treatment agent before using the washing machine 1 or when filling or refilling the tanks 62A to 62C with the treatment agent. The set type of treatment agent is stored in the memory 16a.

[0036] Next, a more detailed description will be given of the structure of the automatic feeding unit 6. Fig. 3 is a perspective view of the automatic feeding unit 6. Fig. 4 is a schematic diagram of the automatic feeding unit 6.

[0037] As shown in FIG. 3, the automatic dispensing unit 6 has a case 61, tanks 62A to 62C, pump mechanisms 63A to 63C, and a treatment agent discharge flow path 64.

[0038] Case 61 is a container with an open top so as to house three tanks 62A to 62C and manual charging case 7. Pump mechanisms 63A, 63B, and 63C, a treatment agent discharge flow path 64, and a water supply valve 10 are connected to a rear surface 57 of case 61.

[0039] As shown in Fig. 4, case 61 has flow paths through which water and processing agent flow below tanks 62A to 62C and manual charging case 7. Although Fig. 4 shows one tank 62A and one pump mechanism 63A, the other tanks 62B to 62C and pump mechanisms 63B to 63C have similar configurations.

[0040] Returning to FIG. 3, the tanks 62A-62C are containers for storing treatment agents such as auxiliary agents and main cleaning agents (i.e., detergents), and are housed in the case 61 lined up on the outer side K1 (horizontally away from the central axis V0 in FIG. 1). The depths and volumes of the three tanks 62A-62C increase toward the outer side K1. Therefore, taking into consideration the types of treatment agents and the volumes of the tanks 62A-62C, the treatment agents may be housed in the tanks 62A-62C in order of least frequently used. For example, the tank 62A may store an auxiliary agent, the tank 62B may store a fabric softener, and the tank 62C may store a detergent. Alternatively, two or more of the tanks 62A-62C may store different types of auxiliary agents. The tanks 62A-62C are removable from the case 61 so that the remaining treatment agents can be replenished when they run low.

[0041] Pump mechanisms 63A, 63B, and 63C are devices that suck a predetermined amount of processing agent from tanks 62A, 62B, and 62C, respectively, and discharge the same into processing agent discharge flow path 64.

[0042] Connected below the pump mechanisms 63A to 63C is a treatment agent discharge flow path 64. Treatment agent discharge flow path 64 is a flow path member whose inlet and outlet are connected to case 61, and returns water flowing in from case 61 to case 61 after merging with the treatment agent discharged from pump mechanisms 63A to 63C.

[0043] Next, the flow of water and processing agent in the automatic dispensing unit 6 will be described.

[0044] First, the supply of water will be described. Water supplied from water supply valve 10 flows into case 61 from the top of case 61 and drops toward the bottom of case 61. As shown in Fig. 4, the water passes along the bottom of case 61, below tanks 62A to 62C, and is supplied to outer tank 3 via connecting flow path 8. Some of the water passes from case 61 through treatment agent discharge flow path 64, flows into case 61 again, and is then supplied to outer tank 3 via connecting flow path 8.

[0045] Next, the flow of the treatment agent will be described. The treatment agent is sucked laterally from tank 62A by pump mechanism 63A and discharged downward toward treatment agent discharge flow path 64. In treatment agent discharge flow path 64, the treatment agent merges with water that has flowed into treatment agent discharge flow path 64 from case 61, flows along the slope of treatment agent discharge flow path 64, and flows into case 61. The treatment agent is then supplied to outer tub 3 together with water via connecting flow path 8. That is, the treatment agent is supplied to outer tub 3 by the flow of water that occurs when water is supplied.

[0046] [Operation] An example of the operation of the washing machine 1 having the above configuration will be described.

[0047] As preparation, the user puts dirty laundry into drum 4. The user sets the desired washing course through operation unit 17. The washing course that washing machine 1 executes is, for example, course 1. Course 1 is a standard washing course executed to remove dirt from laundry.

[0048] <Course 1> The first course will now be described in more detail with reference to Fig. 5. Fig. 5 is a flowchart of the first course of the washing machine 1. When the first course is selected, the control unit 16 refers to the memory 16a and acquires the operating conditions for the first course.

[0049] A start button is displayed on the operation unit 17. When the user presses the start button, the control unit 16 starts the first course.

[0050] 5, first, the control unit 16 determines whether or not the type of auxiliary agent has been set (S11). Specifically, the control unit 16 determines whether or not the type of auxiliary agent has been set by referring to the memory 16a. For example, if the type of treatment agent has been input by the user, the control unit 16 determines that the type of auxiliary agent has been set, and if the type of treatment agent has not been input, the control unit 16 determines that the type of auxiliary agent has not been set.

[0051] If the auxiliary agent is not set (No in S11), the control unit 16 executes the main washing step (S12). In this case, the pre-washing step is not executed.

[0052] If an auxiliary agent is set (Yes in S11), the control unit 16 executes a pre-washing step (S13-1) and a main washing step (S13-2) in this order. The main washing step executed after the pre-washing step is different from the main washing step executed alone.

[0053] Next, the control unit 16 executes a rinsing step (S14) and a spin-drying step (S15), thereby completing the first course. In the rinsing step, water is supplied to the outer tub 3, and the drum 4 is rotated to rinse the laundry. In the rinsing step, fabric softener may be supplied to the outer tub 3 along with the supplied water. In the spin-drying step, the drain valve 11 is opened to drain the water from the outer tub 3 to the outside, and then the drive unit 5 rotates the drum 4 containing the laundry at high speed to spin-dry the laundry.

[0054] In each step, the step currently in progress is displayed on the operation unit 17. For example, when the pre-wash step (S13-1) or the main wash step (S12, S13-2) is in progress, "Washing step" is displayed on the operation unit 17, when the rinsing step (S14) is in progress, "Rinse step" is displayed, and when the spin wash step (S15) is in progress, "Spin wash step" is displayed. On the other hand, when the pre-wash step (S13-1) is in progress, the operation unit 17 may display "Pre-wash step," and when the main wash step (S12, S13-2) is in progress, "Main wash step" is displayed.

[0055] The main washing step (S12) will now be described with reference to Fig. 6. Fig. 6 is a flowchart of the main washing step (S12).

[0056] <First course: Main washing process (S12)> As shown in FIG. 6, first, the control unit 16 acquires the weight of the laundry detected by the laundry amount detection unit 15 (S20).

[0057] Next, the control unit 16 determines the water level for the main wash step (S12) in the outer tub 3, i.e., the main wash water level L1, based on the acquired laundry weight (S21). The water level in the outer tub 3 drops as the drum 4 rotates and water soaks into the laundry. Therefore, by supplying more water, the water completely soaks into the laundry and the water level no longer drops. The main wash water level L1 is the water level after the water completely soaks into the laundry and the water level no longer drops. Specifically, the control unit 16 references the memory 16a to acquire a laundry weight level that includes the acquired laundry weight. The weight level is a weight range, and includes, for example, 0 to less than 3 kg, 3 to less than 5 kg, 5 to less than 7 kg, and 7 to less than 9 kg. The memory 16a stores the correspondence between weight level and water level, and the control unit 16 references the memory 16a to determine the water level corresponding to the acquired weight level as the main wash water level L1.

[0058] Next, the control unit 16 determines the amount of detergent to be supplied based on the acquired laundry weight (S22). Specifically, the control unit 16 determines the amount of detergent to be supplied based on the main wash water level L2, which is determined based on the acquired laundry weight. The memory 16a stores the correspondence between the water level and the amount of detergent to be supplied, and the control unit 16 determines the amount of detergent to be supplied corresponding to the main wash water level L2 by referring to the memory 16a. On the other hand, if the user sets the amount of detergent to be supplied to "more" or "less," the amount to be supplied may be changed from the standard setting to "more" or "less."

[0059] Next, control unit 16 turns on drive unit 5 to rotate drum 4 (S23). This operation and the subsequent supply of water and detergent allow the laundry to be rotated, agitated, and beaten. The first rotation time J1 of drum 4 in the main wash step (S12) is, for example, 9 minutes, and the first drum rotation speed R1 is, for example, 45 rpm. Drive unit 5 rotates for 12 seconds (ON) and stops for 1 second (OFF), repeating this cycle for 9 minutes.

[0060] Next, control unit 16 determines a first open time T1 for opening water supply valve 10 based on main wash water level L1 and the amount of water supplied per unit time of washing machine 1, opens water supply valve 10, and supplies water to drum 4 (S24). Specifically, control unit 16 divides main wash water level L1 by the amount of water supplied per unit time.

[0061] Next, the control unit 16 drives the pump mechanism 63C to discharge the detergent (main cleaning agent) from the tank 62C and supply the detergent to the drum 4 (S25). In the first embodiment, the detergent is supplied simultaneously with the water supply. However, the detergent supply may be delayed relative to the water supply.

[0062] Next, the control unit 16 determines whether the water level in the outer tub 3 has reached the main wash water level L1 (S26). Specifically, the control unit 16 acquires the water level detected by the water level sensor 12 and determines whether the acquired water level is equal to or higher than the main wash water level L1.

[0063] If the acquired water level in the outer tub 3 reaches the main wash water level L1 (Yes in S26), the control unit 16 closes the water supply valve 10 (S27).

[0064] If the acquired water level in the outer tub 3 has not reached the main wash water level L1 (No in S26), the control unit 16 returns to before step S26.

[0065] Next, the control unit 16 turns on the circulation pump 14 (S28). Step S28 may be started simultaneously with step S27. This operation allows the detergent to mix evenly with the water, making it easier for the evenly mixed detergent solution to act on the laundry. The circulation pump 14 operates intermittently, with the ratio of stop time to operation time being 1:1, for example. The first pump rotation speed V1 of the circulation pump 14 in the main wash step (S12) is, for example, 4000 rpm.

[0066] Subsequently, when a predetermined time has elapsed since the driving unit 5 and the circulation pump 14 were respectively turned on, the control unit 16 turns off the driving unit 5 and the circulation pump 14 (S29), and ends the main washing step (S12).

[0067] Next, the pre-washing step and the main washing step (S13-2) will be described with reference to Figures 7 and 8. Figure 7 is a flowchart of the pre-washing step. Figure 8 is a diagram showing the operations of the circulation pump 14, pump mechanisms 63A and 63C, water supply valve 10, and drain valve 11 in the pre-washing step.

[0068] <First course: Pre-washing process (S13-1)> As shown in FIG. 7, first, the control unit 16 acquires the weight of the laundry detected by the laundry amount detection unit 15 (S30).

[0069] Next, the control unit 16 determines the water level for the main washing step (S13-2), that is, the main washing water level L2 (second water level), based on the acquired laundry weight, in the same manner as in step S21 (S31).

[0070] Next, the control unit 16 determines the amount of detergent to be supplied based on the acquired laundry weight, similar to step S22 (S32).

[0071] The amount of detergent supplied may be the same as the amount of detergent supplied in the main wash step (S22) when the pre-wash step is not performed. Furthermore, taking into account that an auxiliary agent is supplied in advance, the amount of detergent supplied may be less than the amount of detergent supplied in the main wash step (S12) when the pre-wash step is not performed. Because the auxiliary agent can alter and decompose dirt, sufficient cleaning can be achieved even with a small amount of detergent supplied. Furthermore, the amount of detergent supplied may be greater than the amount of detergent supplied in the main wash step (S12) when the pre-wash step is not performed. For example, adding a defoaming agent as an auxiliary agent prevents excessive foaming of the detergent in the main wash step, allowing the amount of detergent supplied to be increased. For example, adding a fiber protectant (e.g., silicone) as an auxiliary agent can reduce damage caused by the detergent, allowing the amount of detergent supplied to be increased.

[0072] Next, the control unit 16 acquires the type of auxiliary agent that has been set (S33). Specifically, the control unit 16 refers to the memory 16a and acquires the type of auxiliary agent that has been set by the user.

[0073] Next, the control unit 16 determines the water level for the pre-wash step, i.e., the pre-wash water level L3 (first water level), based on the type of auxiliary agent that has been set and the main-wash water level L2 (S34). Specifically, the control unit 16 determines the pre-wash water level L3 by adding a predetermined water level depending on the type of auxiliary agent to the main-wash water level L2.

[0074] Examples of auxiliary agents include those that are effective by penetrating uniformly into the laundry or stains, and those that are effective at high concentrations. The first embodiment focuses on auxiliary agents that are effective by penetrating uniformly into the laundry or stains. Surrounding the laundry with a large amount of water makes it easier for the auxiliary agent contained in the water to penetrate uniformly into the laundry or stains. Therefore, in the pre-wash step according to the first embodiment, a large amount of water is supplied into the drum 4. Specifically, the pre-wash water level L3 in the pre-wash step is equal to or higher than the main wash water level L2 in the main wash step (S13-2). Meanwhile, both water levels L2 and L3 are lower than the maximum water level Lmax at which water overflows from the drum 4.

[0075] Furthermore, by increasing the pre-wash water level L3, it is possible to prevent the circulation pump 14 from sucking up air instead of water (so-called air entrapment) when the power of the circulation pump 14 is increased. Therefore, by increasing the power of the circulation pump 14, more water and auxiliary agent can be sprayed on the laundry, allowing more of the auxiliary agent to penetrate into the laundry or stains.

[0076] Next, the control unit 16 determines the amount of auxiliary agent to be supplied based on the type of auxiliary agent and the pre-wash water level L3 (S35). The determined amount of auxiliary agent to be supplied corresponds to the concentration at which the auxiliary agent alone exerts its effect at the pre-wash water level L3. Alternatively, the control unit 16 may determine the amount of auxiliary agent to be supplied based only on the type of auxiliary agent, for example.

[0077] Next, the control unit 16 turns on the drive unit 5 to rotate the drum 4 (S36). This operation and the subsequent supply of water and auxiliary agent allow the water and auxiliary agent to mix evenly, making it easier for the auxiliary agent to act evenly on the laundry. Note that step S36 may be omitted.

[0078] Next, the control unit 16 determines the second open time T2 for opening the water supply valve 10 based on the pre-wash water level L3 and the amount of water supplied, opens the water supply valve 10, and supplies water to the drum 4 (S37). As shown in Figure 8, the water level detected by the water level sensor 12 increases.

[0079] Next, when a predetermined time has elapsed since the start of water supply, the control unit 16 drives the pump mechanism 63A to discharge the auxiliary agent from the tank 62A and supply the auxiliary agent to the drum 4 (S38). By discharging the auxiliary agent after a predetermined time has elapsed since the start of water supply, the auxiliary agent is prevented from directly adhering to the laundry, and damage to the laundry can be prevented.

[0080] The supply of the auxiliary agent increases the concentration of the auxiliary agent in the drum 4. On the other hand, the auxiliary agent in the first embodiment is a processing agent that decomposes over time, so the concentration of the auxiliary agent in the drum 4 gradually decreases over time.

[0081] Next, the control unit 16 determines whether the water level in the outer tub 3 has reached the pre-wash water level L3 (S39). Specifically, the control unit 16 acquires the water level detected by the water level sensor 12 and determines whether the acquired water level is equal to or higher than the pre-wash water level L3.

[0082] If the acquired water level in the outer tub 3 reaches the pre-wash water level L3 (Yes in S39), the control unit 16 closes the water supply valve 10 (S40).

[0083] If the acquired water level in the outer tub 3 has not reached the pre-wash water level L3 (No in S39), the control unit 16 returns to before step S39.

[0084] If step S36 is omitted, the control unit 16 may turn on the drive unit 5 for a predetermined time after step S39, i.e., after the auxiliary agent is supplied, to rotate the drum 4. This operation also allows the water and the auxiliary agent to mix uniformly, making it easier for the auxiliary agent to act uniformly on the laundry.

[0085] Next, the control unit 16 turns on the circulation pump 14 (S41). When the circulation pump 14 is turned on, the circulation pump 14 sucks the water in the drum 4 into the circulation flow path 13, lowering the water level in the outer tub 3. On the other hand, after a certain time has passed since the circulation pump 14 was turned on, the amount of water sucked into the circulation flow path 13 and the amount of water flowing out of the circulation flow path 13 balance each other, and the water level in the outer tub 3 stabilizes.

[0086] Next, the control unit 16 drives the pump mechanism 63A to discharge the auxiliary agent from the tank 62A, thereby additionally supplying the auxiliary agent to the drum 4 (S42). In conjunction with the additional supply of auxiliary agent, the control unit 16 opens the water supply valve 10 for a predetermined time to additionally supply water to the drum 4 (S43). By performing such an operation, the auxiliary agent discharged from the tank 62A can be reliably additionally supplied to the drum 4. Steps S42 and S43 may be started at different times or simultaneously.

[0087] The additional supply of the auxiliary agent restores the concentration of the auxiliary agent in the drum 4. Therefore, the concentration of the auxiliary agent in the drum 4 can be maintained within a concentration range in which the auxiliary agent can exert its effect.

[0088] The additional supply of auxiliary agent is carried out at predetermined time intervals. The predetermined time is set, for example, based on the decomposition rate of the auxiliary agent, and the predetermined time is set shorter when the decomposition rate is high and longer when the decomposition rate is low. This operation makes it possible to maintain the concentration of the auxiliary agent being decomposed. In the first embodiment, the additional supply of auxiliary agent is carried out twice at a predetermined time interval. However, additional supply of auxiliary agent may be carried out any number of times at any interval.

[0089] Next, the control unit 16 turns off the circulation pump 14 (S44) and the drive unit 5 (S45), completing the pre-washing process. When the circulation pump 14 is turned off, the water level in the outer tub 3 increases. The water level increases to a fourth water level L4, which is higher than the pre-washing water level L3, through additional water supply. The fourth water level L4 is lower than the maximum water level Lmax. In other words, the number of times additional water is supplied and the amount of water supplied are set so that the fourth water level L4 is lower than the maximum water level Lmax.

[0090] Throughout the pre-wash process, the concentration of the auxiliary agent in the drum 4 is maintained within a concentration range in which the auxiliary agent can exert its effect, so that the auxiliary agent can uniformly penetrate the laundry in the drum 4 or disperse dirt on the laundry.

[0091] Next, the main washing step (S13-2) will be described with reference to Fig. 9. Fig. 9 is a flowchart of the main washing step (S13-2).

[0092] <First course: Main washing process (S13-2)> As shown in FIG. 9, first, because the pre-wash water level L3 is higher than the main-wash water level L2, the control unit 16 opens the drain valve 11 to drain some of the water in the drum 4 (S50). In the first embodiment, the control unit 16 opens the drain valve 11 to drain more water than the difference between the pre-wash water level L3 and the main-wash water level L2. This operation leaves room for water to be supplied to the drum 4 in the main-wash step (S13-1) after draining. For example, after draining, there is room for water to be supplied to supply detergent to the drum 4 in the main-wash step (S13-1). In other words, this drainage prevents the water level in the outer tub 3 from exceeding the maximum water level Lmax, and prevents water from overflowing from the drum 4, even if water is supplied to the drum 4 in the main-wash step (S13-1).

[0093] Specifically, the control unit 16, for example, acquires the water level detected by the water level sensor 12, determines whether the acquired water level has become equal to or lower than the main wash water level L2, and closes the drain valve 11 when the acquired water level becomes equal to or lower than the main wash water level L2. The control unit 16 may also, for example, acquire the flow rate of the water flowing through the drain valve 11 in advance, calculate the drain time for opening the drain valve 11 based on the flow rate and the amount of water drained, and close the drain valve 11 when the drain time has elapsed.

[0094] Next, the control unit 16 turns on the drive unit 5 to rotate the drum 4 (S51). This operation, along with the subsequent supply of water and detergent, allows the laundry to be rotated, agitated, and beaten. The second rotation time J2 of the drum 4 in the main wash step (S13-2) is shorter than the first rotation time J1 in the main wash step (S12), and may be, for example, 3 minutes. The ON ratio of the ON-OFF distribution of the drive unit 5 is smaller than the ON ratio in the main wash step (S12), and the drive unit 5 repeats, for example, 10 seconds of rotation (ON) and 2 seconds of rest (OFF) for 3 minutes. The rotation of the drum 4 contributes to damage to the laundry; a longer rotation time of the drum 4 or a larger ON ratio of the ON-OFF distribution of the drive unit 5 increases the degree of damage, while a shorter rotation time of the drum 4 or a smaller ON ratio reduces the damage. The second drum rotation speed R2 of the drum 4 in the main washing step (S13-2) is lower than the first drum rotation speed in the main washing step (S12), and may be, for example, 35 rpm.

[0095] Next, the control unit 16 determines the third open time T3 for opening the water supply valve 10 based on the main wash water level L2 and the amount of water supplied, opens the water supply valve 10, and supplies water to the drum 4 (S52).

[0096] Next, the control unit 16 drives the pump mechanism 63C to discharge the detergent (main cleaning agent) from the tank 62C and supply the detergent to the drum 4 (S53). In the first embodiment, the third open time T3 is set to the same time as the time for driving the pump mechanism 63C. Alternatively, the third open time T3 may be set to be longer relative to the time for driving the pump mechanism 63C, or the end time of the third open time T3 may be set to be later relative to the end time of driving the pump mechanism 63C. In this case, the water supply ends after the end of driving the pump mechanism 63C. This operation makes it easier to completely flush the detergent supplied by automatic dispensing into the outer tub 3 and prevents the detergent from accumulating or adhering at a position upstream of the outer tub 3. Furthermore, if the time for driving the pump mechanism 63A in step S54 described below is longer than the time for driving the pump mechanism 63C, the third open time T3 may be set to the same time as the time for driving the pump mechanism 63A.

[0097] In the first embodiment, the supply of detergent starts simultaneously with the supply of water, but the start of the supply of detergent may be delayed relative to the start of the supply of water.

[0098] Next, the control unit 16 drives the pump mechanism 63A to discharge the auxiliary agent from the tank 62A, thereby supplying additional auxiliary agent to the drum 4 (S54). In the first embodiment, the control unit 16 determines the amount of auxiliary agent to be supplied depending on the amount of water drained in step S50. Specifically, if the amount of water drained is large, the amount of auxiliary agent to be supplied increases, and if the amount of water drained is small, the amount of auxiliary agent to be supplied decreases. Through this operation, the auxiliary agent discharged by the drainage in step S50 is replenished, and the absolute amount of auxiliary agent in the drum 4 can be maintained.

[0099] In the first embodiment, the supply of the auxiliary agent starts simultaneously with the supply of the detergent, but the start of the supply of the auxiliary agent may be shifted relative to the start of the supply of the detergent.

[0100] Next, the control unit 16 determines whether the water level in the outer tub 3 has reached the main wash water level L2 (S55). Specifically, the control unit 16 acquires the water level detected by the water level sensor 12 and determines whether the acquired water level is equal to or higher than the main wash water level L2.

[0101] If the acquired water level in the outer tub 3 reaches the main wash water level L2 (Yes in S55), the control unit 16 closes the water supply valve 10 (S56).

[0102] If the acquired water level in the outer tub 3 has not reached the main wash water level L2 (No in S55), the control unit 16 returns to before step S55.

[0103] Next, the control unit 16 turns on the circulation pump 14 (S57). Step S57 may be started simultaneously with step S56. This operation allows the detergent and auxiliary agents to mix evenly with the water, making it easier for the detergent and auxiliary agents to act evenly on the laundry. The circulation pump 14 operates intermittently, for example, with a ratio of stop time to operation time of 1:1. The second pump rotation speed V2 of the circulation pump 14 in the main wash step (S13-2) is lower than the first pump rotation speed V1 in the main wash step (S12), and may be, for example, 2500 rpm.

[0104] When an auxiliary agent that alters and decomposes dirt is used as the auxiliary agent, the detergent effect is improved, and therefore the mechanical power of the washing machine 1 can be reduced in the operations of steps S56 and S57 relative to the main wash step (S12). As described above, the mechanical power is mechanical output, and is specifically affected by parameters such as the rotation time of the drum 4, the rotation speed of the drum 4, and the rotation speed of the circulation pump 14. In the first embodiment, the rotation time of the drum 4, the rotation speed of the drum 4, and the rotation speed of the circulation pump 14 are all changed, but at least one of the rotation time of the drum 4, the rotation speed of the drum 4, and the rotation speed of the circulation pump 14 may also be changed.

[0105] Subsequently, when a predetermined time has elapsed since the drive unit 5 and the circulation pump 14 were respectively turned on, the control unit 16 turns off the drive unit 5 and the circulation pump 14 (S58), and ends the main washing step (S13-2).

[0106] <Course 2> Another washing course that the washing machine 1 can execute is the second course. The second course is intended for laundry that is more delicate or more susceptible to damage than the first course, and is executed to remove dirt from the laundry while minimizing damage to the laundry. Therefore, the control unit 16 reduces the mechanical power of the washing machine 1 in the second course compared to the first course.

[0107] Here, an example of the second course will be described, focusing on the differences from the first course.

[0108] Specifically, in the second course, in step S23 of the main washing process (S12) and step S51 of the main washing process (S13-2) where the drive unit 5 is turned on, the drum 4 performs rocking agitation instead of rotation agitation. Rocking agitation is an operation in which the drum 4 rocks from side to side, and the rotation angle of the drum 4 during rocking agitation is less than 360°. For example, the drum 4 performing rocking agitation rotates for 2 seconds and stops for 25 seconds, repeating this cycle.

[0109] The time for shaking the drum 4 may be longer than the rotation time of the drum 4 in the first course. Furthermore, in the step S28 of the main washing process (S12) and the step S57 of the main washing process (S13-2) where the circulation pump 14 is turned on, the operation time of the circulation pump 14 in the second course may be longer than that in the first course. This operation makes it possible to ensure sufficient cleaning power while reducing the mechanical force caused by the rotation of the drum 4.

[0110] Furthermore, the control unit 16 may reduce the mechanical power of the washing machine 1 in the pre-washing step, the rinsing step, or the spin-drying step of the second course compared to the first course.

[0111] (summary) The above explanations are summarized to describe the features of the present disclosure.

[0112] The washing machine 1 according to the first embodiment executes a pre-wash step before the main wash step. By executing the pre-wash step, the effect of the detergent, which is the main washing agent, can be enhanced. Furthermore, the main wash step is executed without completely draining the water supplied to the drum 4 in the pre-wash step, leaving the water from the pre-wash step. Therefore, the auxiliary agent supplied to the drum 4 in the pre-wash step remains in the drum 4 during the main wash step, allowing the auxiliary agent to exert its effect during the main wash step.

[0113] The control unit 16 determines the pre-wash water level L3 for the pre-wash step based on the type of auxiliary agent. Since the concentration range in which the auxiliary agent exerts its effect varies depending on the type of auxiliary agent, adjusting the pre-wash water level L3 can enhance the effect of the auxiliary agent in the pre-wash step.

[0114] Because the auxiliary agent is a treatment agent that decomposes over time, the additional supply of the auxiliary agent can maintain the concentration of the auxiliary agent within a concentration range in which the auxiliary agent can exert its effect, thereby maintaining the effect of the auxiliary agent throughout the pre-washing process.

[0115] [effect] The washing machine 1 according to the first embodiment can achieve the following effects.

[0116] As described above, washing machine 1 of embodiment 1 includes drum 4 (washing tub) configured to accommodate laundry, water supply valve 10 (water supply device) that supplies water to drum 4, automatic dosing unit 6 (treatment agent supply device) that supplies auxiliary agent (first treatment agent) or detergent (second treatment agent) to drum 4, and control unit 16. Control unit 16 executes a pre-wash step and a main wash step (S13-2). In the pre-wash step, automatic dosing unit 6 supplies auxiliary agent and water supply valve 10 supplies water, and a washing operation is performed using water containing auxiliary agent. In the main wash step (S13-2), after the pre-wash step, automatic dosing unit 6 supplies detergent, and a washing operation is performed using water containing auxiliary agent and detergent.

[0117] With this configuration, the auxiliary agent remains in the drum 4 during the main combined wash, allowing the auxiliary agent's effects to be exerted even during the main combined wash. This improves the cleaning power of the detergent. Furthermore, the coexistence of the auxiliary agent and detergent makes it easier for the auxiliary agent and detergent to exert a synergistic effect on the laundry when they interact with each other.

[0118] Washing machine 1 of embodiment 1 further includes a laundry amount detection unit 15 that detects the amount of laundry contained in drum 4. Control unit 16 determines a main wash water level L2 (second wash water level) in the main wash step (S13-2) based on the amount of laundry detected by laundry amount detection unit 15, and determines a pre-wash water level L3 (first wash water level) in the pre-wash step based on the type of auxiliary agent and second wash water level L2.

[0119] This configuration allows the appropriate water level to be determined based on the type of detergent and the weight of the laundry while indirectly referencing the weight of the laundry, thereby maintaining the detergent concentration within the appropriate concentration range during the pre-washing process and enhancing the detergent's effect on the laundry.

[0120] In the washing machine 1 of the first embodiment, the detergent is a treatment agent of a different type from the auxiliary agent.

[0121] This configuration can increase the effectiveness of the detergent compared to simply increasing the amount of detergent dispensed.

[0122] In the washing machine 1 of the first embodiment, the pre-wash water level L3 in the pre-wash step is higher than the main wash water level L2 in the main wash step.

[0123] With this configuration, the laundry is surrounded by a large amount of water, which makes it easier for the auxiliary agent to act uniformly on the laundry.

[0124] Washing machine 1 of embodiment 1 further includes drain valve 11 (drain device) configured to selectively drain water from drum 4. After the pre-wash step is completed, control unit 16 further executes a drain step (S50) in which control unit 16 causes drain valve 11 to drain a portion of the water from drum 4.

[0125] This configuration can prevent water from overflowing from the drum 4 in the main washing step (S13-2).

[0126] In the washing machine 1 of the first embodiment, in the drain step (S50), the control unit 16 causes the drain valve 11 to drain more water than the amount of water corresponding to the difference between the pre-wash water level L3 and the main wash water level L2.

[0127] This configuration can further prevent water from overflowing from the drum 4 in the main washing step (S13-2).

[0128] In the washing machine 1 of the first embodiment, after the pre-washing step is completed, the control unit 16 causes the automatic dispensing unit 6 to supply additional adjuvant agent in accordance with the amount of water drained by the drain valve 11.

[0129] With this configuration, the auxiliary agent discharged from the drum 4 by drainage can be replenished.

[0130] In the washing machine 1 of the first embodiment, the pre-washing process includes a step (S42) in which the automatic dosing unit 6 supplies additional auxiliary agent after the auxiliary agent has been supplied.

[0131] With this configuration, by additionally supplying the auxiliary agent, the concentration of the auxiliary agent can be increased, thereby enhancing the effect of the auxiliary agent.

[0132] In the washing machine 1 of the first embodiment, the pre-washing process includes a step of supplying additional water (S43) after the supply of the auxiliary agent, and a step of the automatic dosing unit 6 supplying additional auxiliary agent (S42).

[0133] With this configuration, when steps S42 and S43 are performed together, the auxiliary agent can be supplied to the drum 4 by the flow of water. Therefore, the auxiliary agent can more reliably reach the drum 4. Furthermore, even when additional water is supplied to replenish the water absorbed by the laundry and adjust the water level, the concentration of the auxiliary agent can be maintained.

[0134] In the washing machine 1 of the first embodiment, the auxiliary agent is a substance that decomposes over time.

[0135] With this configuration, the concentration of the supplemental agent can be maintained and the effect of the supplemental agent can be restored by additional supply.

[0136] The washing machine 1 of the first embodiment further includes an operation unit 17 that can set the type of auxiliary agent. Depending on whether the type of auxiliary agent has been set, the control unit 16 determines whether to execute the main wash process (S12) or the main wash process (S13-2) (washing conditions for the main wash process).

[0137] With this configuration, if an auxiliary agent is set, a pre-wash step is executed, which makes it easier to remove dirt. In this case, the operating conditions for the main wash step (S13-2) can be set to a lower load or shorter time than the operating conditions for the main wash step (S12). This operation prevents damage to laundry and further reduces energy consumption of the washing machine 1.

[0138] In the washing machine 1 of the first embodiment, when the type of auxiliary agent is set, the control unit 16 reduces the mechanical force in the main washing step (S13-2).

[0139] This configuration can prevent damage to laundry caused by the combined main wash.

[0140] The washing machine 1 of the first embodiment further includes a circulation flow path 13 having an inlet 13a and an outlet 13b connected to the outer tub 3, and a circulation pump 14 provided in the circulation flow path 13 to circulate the water in the drum 4. Reducing the mechanical power in the main wash step (S13-2) includes at least one of shortening the rotation time of the drum 4, lowering the rotation speed of the drum 4, and lowering the rotation speed of the circulation pump 14.

[0141] This configuration can further prevent damage to laundry caused by the combined main wash.

[0142] The present disclosure is not limited to the first embodiment, but can be embodied in various other forms.

[0143] In the first embodiment, the central axis V0 of the outer tub 3 is inclined at an angle relative to the horizontal, but the present invention is not limited to this. For example, the washing machine 1 may be a vertical washing machine, and the central axis V0 of the outer tub 3 may extend in the vertical direction.

[0144] Although the automatic dosing unit 6 and the manual dosing case 7 supply a liquid processing agent to the outer tub 3 in the above example, the present invention is not limited to this. For example, the automatic dosing unit 6 or the manual dosing case 7 may supply a powdered processing agent or a solid processing agent such as a tablet to the outer tub 3.

[0145] In the first embodiment, the treatment agent is supplied by supplying water, but this is not limiting. The treatment agent may be supplied at a timing different from the timing of water supply. For example, the treatment agent may be directly ejected onto the drum 4.

[0146] In the first embodiment, the treatment agent is supplied by the automatic supply unit 6 in the pre-washing step and the main washing step, but the present invention is not limited to this. The treatment agent may also be supplied manually.

[0147] In the first embodiment, the cleaning agent is described as a single detergent, but this is not limiting. The cleaning agent may be one or more of an alkaline agent, a bleaching agent, and an enzyme. On the other hand, if the cleaning agent is a weak alkaline detergent, it is desirable that the auxiliary agent is also alkaline, and if the cleaning agent is an acidic detergent, it is desirable that the auxiliary agent is also acidic. If the cleaning agent is an alkaline detergent or a neutral detergent and the auxiliary agent is alkaline, the cleaning power can be improved. Furthermore, if the cleaning agent is an alkaline detergent and the auxiliary agent is a bleach, the disinfecting effect can be improved.

[0148] In the first embodiment, the auxiliary agent is described as a treatment agent that is effective by penetrating into the laundry or a treatment agent that disperses dirt, but this is not limiting. As will be described in Modification 1 below, the auxiliary agent may be a treatment agent that is effective at a high concentration. In this case, the pre-wash water level L3 in the pre-wash step is set lower than the main-wash water level L2 in the main-wash step (S13-2).

[0149] In the first embodiment, the cleaning agent and the auxiliary agent are different types of treatment agents, but this is not limiting. The cleaning agent and the auxiliary agent may share one or more components. For example, the cleaning agent and the auxiliary agent may share enzymes, anti-redeposition agents, water softeners, etc. The cleaning agent and the auxiliary agent may also be the same.

[0150] In the first embodiment, the laundry amount detection unit 15 detects the weight of the laundry, but the present invention is not limited to this. For example, the laundry amount detection unit 15 may detect other physical quantities that indicate the amount of laundry, such as the volume of the laundry.

[0151] In the first embodiment, the amount of laundry is detected during the pre-washing or main washing process, and the water levels L1 and L2 are determined based on the weight of the laundry. However, this is not limiting. The water levels L1, L2, and L3 may be preset values.

[0152] In the first embodiment, the controller 16 determines the pre-wash water level L3 based on the type of auxiliary agent and the main-wash water level L2. However, the present invention is not limited to this. The controller 16 may determine the pre-wash water level L3 based on the type of auxiliary agent and the weight of the laundry detected by the laundry amount detector 15.

[0153] In the first embodiment, an example in which the auxiliary agent decomposes over time has been described, but the present invention is not limited to this. An auxiliary agent that does not decompose over time may also be used. In this case, the additional supply of auxiliary agent (S42) and the additional supply of water (S43) may be omitted.

[0154] In the first embodiment, an example in which only the auxiliary agent contained in the tank 62A is supplied in the pre-washing step has been described, but this is not limiting. For example, in the additional supply of auxiliary agent (S42), another auxiliary agent may be supplied instead of or in addition to the auxiliary agent contained in the tank 62A.

[0155] In the first embodiment, the main washing step (S13-2) is performed after the pre-washing step, but the present invention is not limited to this. For example, the main washing step (S12) may be performed after the pre-washing step.

[0156] In the first embodiment, the suction port 13a of the circulation flow path 13 is located at the bottom of the drum 4. However, this is not limiting. For example, the suction port 13a may be located above the bottom. In this configuration, when the circulation pump 14 is turned on and the circulation pump 14 sucks up water from the drum 4, if the water level in the outer tub 3 becomes lower than the suction port 13a, the circulation pump 14 may have difficulty sucking up water. Therefore, the rotation speed of the circulation pump 14 is set based on the pre-wash water level L3 and the ON time of the circulation pump 14. For example, if the pre-wash water level L3 is low and the ON time is long, setting the rotation speed of the circulation pump 14 low can help prevent air from being sucked into the circulation flow path 13 instead of water (so-called "air entrapment").

[0157] In the first embodiment, an example in which operation unit 17 is provided in washing machine 1 has been described, but the present invention is not limited to this. Operation unit 17 may be provided in a device separate from washing machine 1. For example, an application stored in a user's smartphone may function as operation unit 17. Specifically, washing machine 1 may have a communication unit, and the communication unit of washing machine 1 may communicate with the smartphone, and operation unit 17 such as a start button may be displayed on the display of the smartphone.

[0158] Although the example in which the interval between additional supplies is set based on the decomposition rate of the auxiliary agent has been described, the present invention is not limited to this. For example, the interval between additional supplies may be set based on a decrease in the concentration of the auxiliary agent due to consumption of components in the detergent solution that occurs when the detergent penetrates into fabrics (cotton, synthetic fibers). The interval between additional supplies may also be set based on a decrease in the concentration of the auxiliary agent due to consumption of components in the detergent solution that occurs when the detergent penetrates into stains (e.g., emulsification).

[0159] In the first embodiment, the control unit 16 determines whether or not the type of auxiliary agent has been set, and determines whether or not to perform the pre-washing step based on the determination. However, the present invention is not limited to this. For example, as will be described in a second modified example below, the user may input whether or not to perform the pre-washing step, and the control unit 16 may determine whether or not to perform the pre-washing step based on the input.

[0160] (Variation 1) While the first embodiment focuses on treatment agents that are effective by uniformly penetrating laundry or stains, the first modification focuses on auxiliary agents that are effective at high concentrations. Examples of auxiliary agents in the first modification include alkaline agents, enzymes, bleaching agents, stain denaturing agents, detergents that remove oily stains, bacteria control agents, and disinfectants.

[0161] 10 is a diagram showing the operations of the circulation pump 14, pump mechanisms 63A and 63C, water supply valve 10, and drain valve 11 in the pre-washing step in Modification 1. Steps S42 and S43 relating to the additional supply of auxiliary agent are omitted from FIG.

[0162] Unless otherwise specified, the operation of washing machine 1 in Modification 1 is the same as the operation of washing machine 1 in Embodiment 1. The following describes the differences from Embodiment 1.

[0163] In step S34, the control unit 16 determines the water level for the pre-wash step, i.e., pre-wash level L3, based on the type of auxiliary agent that has been set and the main-wash water level L2. Because the auxiliary agent in Modification 1 is a treatment agent that is effective at high concentrations, it is desirable to keep the amount of water in the drum 4 small during the pre-wash step. Therefore, as shown in FIG. 10, the pre-wash water level L3 for the pre-wash step is lower than the main-wash water level L2 for the main-wash step (S13-2). This pre-wash water level L3 increases the concentration of the auxiliary agent in the drum 4 during the pre-wash step, allowing the auxiliary agent to exert its effect.

[0164] Also, the pre-wash water level L3 is higher than the suction port 13a of the circulation flow path 13. In Fig. 10, the minimum water level Lmin indicates the height of the suction port 13a of the circulation flow path 13, and the pre-wash water level L3 is higher than the minimum water level Lmin. Such a pre-wash water level L3 makes it easier to prevent the circulation pump 14 from sucking in air instead of water (so-called "air entrapment") when the circulation pump 14 is turned on in step S41.

[0165] In step S41, the control unit 16 turns on the circulation pump 14. When the circulation pump 14 is turned on, water and auxiliary agent can be poured over the laundry. Therefore, even if the amount of laundry is large, the entire laundry can be soaked in water and auxiliary agent. In step S41, the water level in the outer tub 3 decreases and stabilizes at a stable water level L5 that is higher than the minimum water level Lmin.

[0166] In the main wash step (S13-2) of the washing machine 1 in Modification 1, step S50, i.e., draining water after the pre-wash step, is omitted. In other words, between the pre-wash step and the main wash step (S13-2), the control unit 16 keeps the drain valve 11 closed. This operation allows the auxiliary agent supplied in the pre-wash step to exert its effect on the laundry in the main wash step (S13-2) in the supplied amount. The control unit 16 may acquire the water level detected by the water level sensor 12, and execute a step of opening the drain valve 11 after the acquired water level reaches the main wash water level L2.

[0167] In step S52, the control unit 16 determines the third open time T3 for opening the water supply valve 10 based on the main-wash water level L2 and the amount of water supplied, opens the water supply valve 10, and supplies water to the drum 4. Because the pre-wash water level L3 is lower than the main-wash water level L2, the water supply in step S52 does not cause water to overflow from the drum 4.

[0168] Although the first modification has been described as an example in which draining water after the pre-wash step is omitted, this is not limiting. For example, if the difference between the pre-wash water level L3 and the main-wash water level L2 is small, the control unit 16 may execute a step of opening the drain valve 11 after the pre-wash step.

[0169] (Variation 2) 11 is a flowchart of the first course of a washing machine according to Modification 2. In Modification 2, a course including a pre-wash step and a course not including a pre-wash step are provided as separate courses. In other words, control unit 16 does not automatically determine whether to perform a pre-wash step based on whether the type of auxiliary agent is set. Instead, control unit 16 performs a course including a pre-wash step or a course not including a pre-wash step based on a user's input.

[0170] Unless otherwise specified, the operation of washing machine 1 in Modification 2 is the same as the operation of washing machine 1 in Embodiment 1. The following describes the differences from Embodiment 1.

[0171] The operation of washing machine 1 in Modification 2 will be described with reference to FIG. 11. First, the user sets the washing course they wish to run via operation unit 17. Here, courses that include a pre-washing step and courses that do not include a pre-washing step are displayed as different courses on operation unit 17. Specifically, if the user sets the type of auxiliary agent, the course that includes the pre-washing step is displayed as selectable on operation unit 17. On the other hand, if the user does not set the type of auxiliary agent, the course that includes the pre-washing step is displayed as unselectable on operation unit 17.

[0172] Next, the control unit 16 determines whether or not a course including a pre-wash has been selected (S101).

[0173] If a course including a pre-wash is selected (Yes in S101), the control unit 16 executes a pre-wash step and a main wash step (S13-1, S13-2).

[0174] If a course including a pre-wash has not been selected (No in S101), the control unit 16 determines whether a course not including a pre-wash has been selected (S102).

[0175] If a course not including a pre-wash is selected (Yes in S102), the control unit 16 executes the main wash step (S12).

[0176] If a course not including a pre-wash has not been selected (No in S102), the control unit 16 ends the operation. On the other hand, if other courses are provided, the control unit 16 may execute the other courses.

[0177] (Embodiment 2) A laundry system 201 according to a second embodiment of the present disclosure will be described. In the second embodiment, differences from the first embodiment will be mainly described, and descriptions that overlap with the first embodiment will be omitted. In the second embodiment, the same or equivalent configurations as those in the first embodiment will be described with the same reference numerals.

[0178] FIG. 12 is a block diagram of a laundry system 201 according to the second embodiment of the present disclosure.

[0179] As shown in FIG. 12, a laundry system 201 includes a washing machine 202, a terminal device 222, and a processing device 212.

[0180] Washing machine 202 further includes first communication unit 204. Washing machine 202 in the second embodiment is the same as washing machine 1 in the first embodiment unless otherwise specified.

[0181] First communication unit 204 receives, via the network, the operation conditions of washing machine 202 transmitted by terminal device 222. First communication unit 204 receives, via the network, the operation conditions of washing machine 202 for washing courses such as the first course and the second course. First communication unit 204 includes a circuit for receiving from processing device 212 in accordance with a predetermined communication standard (e.g., LAN, Wi-Fi (registered trademark), Bluetooth (registered trademark)).

[0182] Terminal device 222 is a device capable of communicating with washing machine 202 and processing device 212. Terminal device 222 is, for example, a smartphone. Terminal device 222 may also function as operation unit 17 of the first embodiment.

[0183] The processing device 212 includes a processing unit 213 and a second communication unit 214. The processing device 212 is a computer. For example, the processing device 212 is a server or a cloud.

[0184] The processing unit 213 stores, in place of the memory 16a according to the first embodiment, the operation conditions of the washing courses to be executed by the washing machine 202, that is, the pre-washing process, the main washing process, the rinsing process, and the spin-drying process.

[0185] Second communication unit 214 transmits the operation conditions of washing machine 202 stored in processing unit 213 via the network. Specifically, second communication unit 214 transmits the operation conditions of washing machine 202 to terminal device 222 via the network in response to an operation of terminal device 222. Second communication unit 214 includes a circuit that performs transmission to terminal device 222 in accordance with a predetermined communication standard (for example, LAN, Wi-Fi (registered trademark), Bluetooth (registered trademark)).

[0186] The user selects a desired course on terminal device 222. In response to the user's selection, processing device 212 transmits the operating conditions of the selected course to terminal device 222 via second communication unit 214. When the user operates terminal device 222, terminal device 222 transmits the operating conditions of the selected course to first communication unit 204. Washing machine 202 executes the washing course based on the operating conditions received by first communication unit 204.

[0187] It should be noted that the terminal device 222 may be omitted, and the washing machine 202 and the processing device 212 may communicate directly with each other.

[0188] [effect] According to the laundry system 201 according to the second embodiment, the following effects can be achieved.

[0189] As described above, laundry system 201 of the first embodiment includes washing machine 202 and processing device 212 that communicates with washing machine 202 via a network. Washing machine 202 includes drum 4 configured to accommodate laundry, water supply valve 10 that supplies water to drum 4, automatic dispensing unit 6 that supplies auxiliary agent or detergent to drum 4, and control unit 16 that executes a washing course. Washing machine 202 also includes first communication unit 204 that receives operating conditions for the washing course via the network. Processing device 212 includes processing unit 213 that stores the operating conditions for the washing course and second communication unit 214 that transmits the operating conditions for the washing course via the network. The washing course includes a pre-wash step and a main wash step (S13-2). In the pre-wash step, automatic dispensing unit 6 supplies auxiliary agent, water supply valve 10 supplies water, and the washing operation is performed using water containing the auxiliary agent. In the main washing step (S13-2), after the pre-washing step, the automatic dispenser unit 6 is caused to supply detergent, and washing is performed using water containing an auxiliary agent and detergent.

[0190] With this configuration, the variety of washing courses can be increased by downloading washing courses to be executed by washing machine 202. This makes it easier for the user to make washing machine 202 execute a washing course that meets his or her needs.

[0191] In the second embodiment, an example has been described in which laundry system 201 includes washing machine 202 and processing device 212, but this is not limiting. For example, as shown in FIG. 13, laundry system 201 of modified example 3 may further include terminal device 222. FIG. 13 is a block diagram of laundry system 201 of modified example 3. Terminal device 222 is a device capable of communicating with washing machine 202 and processing device 212. Terminal device 222 is, for example, a smartphone. Terminal device 222 may also function as operation unit 17 of the first embodiment.

[0192] The washing machine in a first aspect includes a washing tub configured to accommodate laundry, a water supply device that supplies water to the washing tub, a treatment agent supply device that supplies a first treatment agent or a second treatment agent to the washing tub, and a control unit. The control unit executes a first washing step in which the treatment agent supply device supplies the first treatment agent, the water supply device supplies water, and a washing operation is performed with water containing the first treatment agent, and after the first washing step, the control unit executes a second washing step in which the treatment agent supply device supplies the second treatment agent, and a washing operation is performed with water containing the first treatment agent and the second treatment agent.

[0193] In the second aspect, the washing machine is the same as in the first aspect, but further includes a fabric amount detection unit that detects the amount of laundry contained in the washing tub, and the control unit determines the first wash water level in the first washing step based on the type of the first treatment agent and the amount of laundry detected by the fabric amount detection unit.

[0194] In a third aspect, the washing machine is the same as in the first aspect, but further includes a laundry amount detection unit that detects the amount of laundry contained in the washing tub, and the control unit determines the second washing water level in the second washing process based on the amount of laundry detected by the laundry amount detection unit, and determines the first washing water level in the first washing process based on the type of first treatment agent and the second washing water level.

[0195] A fourth aspect of the washing machine is the washing machine according to any one of the first to third aspects, wherein the second treatment agent is different from the first treatment agent.

[0196] A fifth aspect of the washing machine is the washing machine of any one of the first to fourth aspects, wherein the water level in the first washing step is higher than the water level in the second washing step.

[0197] In a sixth aspect, the washing machine is the washing machine of the fifth aspect, further comprising a drainage device configured to selectively drain the water in the washing tub, and after the first washing step is completed, the control unit further executes a drainage step in which the drainage device drains some of the water in the washing tub.

[0198] In a seventh aspect of the washing machine, in the washing machine of the sixth aspect, in the draining step, the control unit causes the draining device to drain more water than the amount of water corresponding to the difference between the first wash water level and the second wash water level.

[0199] In the washing machine of the eighth aspect, in the washing machine of the sixth or seventh aspect, after the first washing step is completed, the control unit causes the treatment agent supply device to supply additional first treatment agent according to the amount of water drained by the drainage device.

[0200] A washing machine in a ninth aspect is a washing machine in any one of the fifth to eighth aspects, further comprising a circulation flow path whose intake and discharge ports are connected to the washing tub, and a circulation pump provided in the circulation flow path to circulate the water in the washing tub, and the rotation speed of the circulation pump in the first washing step is set based on the first washing water level and the ON time of the circulation pump.

[0201] In a tenth aspect of the washing machine, in the washing machine of any one of the first to ninth aspects, the first washing step includes a step in which, after the first treatment agent is supplied, the treatment agent supply device supplies additional first treatment agent.

[0202] In the washing machine of the 11th aspect, in the washing machine of any of the first to tenth aspects, the first washing process includes a step of rotating the washing tub after supplying the first treatment agent, and a step of the treatment agent supply device supplying additional first treatment agent after the rotation.

[0203] As a washing machine in a 12th aspect, in a washing machine in any of the first to 11th aspects, the first washing process includes a step in which the water supply device supplies additional water after the first treatment agent is supplied, and a step in which the treatment agent supply device supplies additional first treatment agent.

[0204] A thirteenth aspect of the invention relates to the washing machine of any one of the first to twelfth aspects, wherein the first treatment agent is a substance that decomposes over time.

[0205] As a washing machine in a 14th aspect, in the washing machine in any one of the first to 13th aspects, the first washing process includes a step in which, after supplying the first treatment agent, the treatment agent supply device supplies a third treatment agent different from the first treatment agent to the washing tub.

[0206] As a washing machine in a 15th aspect, in the washing machine in the 14th aspect, the first washing process includes a step in which the washing tub rotates after the first treatment agent is supplied, and a step in which the treatment agent supply device supplies a third treatment agent after the rotation.

[0207] In a 16th aspect, the washing machine is a washing machine in any one of the first to fifteenth aspects, further comprising an operation unit that allows the type of first treatment agent to be set, and the control unit determines the washing conditions for the second washing step depending on whether the type of the first treatment agent has been set or not.

[0208] In a seventeenth aspect, in the washing machine according to the sixteenth aspect, when the type of the first treatment agent is set, the control unit reduces the mechanical power in the second washing step.

[0209] As an 18th aspect of the washing machine, in the washing machine of the 17th aspect, the washing machine further comprises a circulation flow path whose intake and discharge ports are connected to the washing tub, and a circulation pump provided in the circulation flow path to circulate water in the washing tub, and reducing the mechanical force in the second washing step includes at least one of shortening the rotation time of the washing tub, lowering the rotation speed of the washing tub, and lowering the rotation speed of the circulation pump.

[0210] A washing system in a 19th aspect is a washing system including a washing machine and a processing device that communicates with the washing machine via a network, wherein the washing machine has a washing tub configured to hold laundry, a water supply device that supplies water to the washing tub, a processing agent supply device that supplies a first processing agent or a second processing agent to the washing tub, a control unit that executes a washing course, and a first communication unit that receives operating conditions for the washing course via the network, and the processing device has a processing unit that stores the operating conditions for the washing course and a second communication unit that transmits the operating conditions for the washing course via the network, and the washing course includes a first washing step in which the processing agent supply device supplies the first processing agent, the water supply device supplies water, and a washing operation is performed with water containing the first processing agent, and a second washing step in which, after the first washing step, the processing agent supply device supplies the second processing agent, and a washing operation is performed with water containing the first processing agent and the second processing agent.

[0211] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims unless they depart therefrom. [Industrial Applicability]

[0212] The washing machine of the present disclosure is capable of supplying auxiliary agents and is therefore useful as a domestic washing machine, a commercial washing machine, or any type of washer / dryer (for example, a domestic drum washing machine or a top-loading washing machine). [Explanation of symbols]

[0213] 1 washing machine 2. Case 3 Outer tank 4 Drums 5 Drive unit 6 Automatic feeding unit 7 Manual Input Case 8 Connecting Channels 10. Water supply valve 11 Drain valve 12 Water level sensor 13 Circulation flow path 14 Circulation pump 15 Cloth amount detection unit 16 Control Unit 17 Control section 61 cases 62A~62C Tank 63A~63C Pump mechanism

Claims

1. A washing tub configured to be able to accommodate laundry; a water supply device that supplies water to the washing tub; a treatment agent supplying device for supplying a first treatment agent and a second treatment agent to the washing tub; a control unit, The control unit a first washing step of causing the treatment agent supply device to supply the first treatment agent, causing the water supply device to supply water, and performing a washing operation with water containing the first treatment agent; a second washing step in which, after the first washing step, the second treatment agent is supplied from the treatment agent supply device, and a washing operation is performed using water containing the first treatment agent and the second treatment agent; Run The washing machine, wherein the water level in the first washing step is higher than the water level in the second washing step.

2. Further, a laundry amount detection unit is provided to detect the amount of laundry contained in the washing tub, The washing machine according to claim 1 , wherein the control unit determines a first wash water level in the first washing process based on the type of the first treatment agent and the amount of laundry detected by the laundry amount detection unit.

3. Further, a laundry amount detection unit is provided to detect the amount of laundry contained in the washing tub, 2. The washing machine according to claim 1, wherein the control unit determines a second wash water level in the second washing process based on the amount of laundry detected by the laundry amount detection unit, and determines a first wash water level in the first washing process based on the type of the first treatment agent and the second wash water level.

4. The washing machine of claim 1 , wherein the second treatment agent is different from the first treatment agent.

5. The washing machine further includes a drainage device configured to selectively drain water from the washing tub, The washing machine according to claim 1 , further comprising: a draining step in which, after the first washing step is completed, the control unit causes the drain device to drain a portion of the water in the washing tub.

6. The washing machine according to claim 5, wherein in the draining step, the control unit causes the draining device to drain more water than the amount of water corresponding to a difference between the first wash water level and the second wash water level.

7. The washing machine according to claim 5, wherein after the first washing step is completed, the control unit controls the treatment agent supply device to supply additional first treatment agent in accordance with the amount of drainage by the drainage device.

8. The washing machine further includes a circulation flow path having an inlet and an outlet connected to the washing tub, and a circulation pump provided in the circulation flow path to circulate water in the washing tub, The washing machine according to claim 1 , wherein the rotation speed of the circulation pump in the first washing step is set based on the first washing water level and an ON time of the circulation pump.

9. The washing machine according to claim 1 , wherein the first washing step includes a step in which, after the first treatment agent is supplied, the treatment agent supply device supplies additional first treatment agent.

10. 2. The washing machine according to claim 1, wherein the first washing step includes a step of rotating the washing tub after supplying the first treatment agent, and a step of supplying additional first treatment agent by the treatment agent supply device after the rotation.

11. 2. The washing machine according to claim 1, wherein the first washing step includes a step of the water supply device additionally supplying water after the first treatment agent is supplied, and a step of the treatment agent supply device additionally supplying the first treatment agent.

12. The washing machine according to claim 1 , wherein the first treatment agent is a substance that decomposes over time.

13. 2. The washing machine according to claim 1, wherein the first washing step includes a step in which, after the first treatment agent is supplied, the treatment agent supply device supplies a third treatment agent different from the first treatment agent to the washing tub.

14. The washing machine according to claim 13, wherein the first washing step includes a step of rotating the washing tub after supplying the first treatment agent, and a step of supplying the third treatment agent by the treatment agent supply device after the rotation.

15. A washing tub configured to be able to accommodate laundry; a water supply device that supplies water to the washing tub; a treatment agent supplying device for supplying a first treatment agent and a second treatment agent to the washing tub; an operation unit capable of setting the type of the first treatment agent; a control unit, The control unit a first washing step of causing the treatment agent supply device to supply the first treatment agent, causing the water supply device to supply water, and performing a washing operation with water containing the first treatment agent; a second washing step in which, after the first washing step, the second treatment agent is supplied from the treatment agent supply device, and a washing operation is performed using water containing the first treatment agent and the second treatment agent; Run The control unit determines washing conditions for the second washing step depending on whether or not the type of the first treatment agent is set.

16. The washing machine according to claim 15, wherein the control unit reduces the mechanical force in the second washing step when the type of the first treatment agent is set.

17. The washing machine further includes a circulation flow path having an inlet and an outlet connected to the washing tub, and a circulation pump provided in the circulation flow path to circulate water in the washing tub, 17. The washing machine according to claim 16, wherein reducing the mechanical power in the second washing step includes at least one of shortening a rotation time of the washing tub, lowering a rotation speed of the washing tub, and lowering a rotation speed of the circulation pump.

18. A laundry system comprising a washing machine and a processing device that communicates with the washing machine via a network, The washing machine comprises: A washing tub configured to be able to accommodate laundry; a water supply device that supplies water to the washing tub; a treatment agent supplying device for supplying a first treatment agent and a second treatment agent to the washing tub; a control unit that executes a washing course; a first communication unit that receives the operation conditions of the washing course via the network, The processing device includes: a processing unit that stores operation conditions of the washing course; a second communication unit that transmits the operation conditions of the washing course via the network, The washing course is a first washing step of causing the treatment agent supply device to supply the first treatment agent, causing the water supply device to supply water, and performing a washing operation with water containing the first treatment agent; a second washing step in which, after the first washing step, the second treatment agent is supplied from the treatment agent supply device, and a washing operation is performed using water containing the first treatment agent and the second treatment agent; Including, A laundry system in which washing conditions for the second washing step are determined depending on whether or not the type of the first treatment agent is set.

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