Washing machines and washing systems

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 a washing machine and a washing system.

Background Art

[0002] [[ID=eleven]] For example, Patent Document 1 discloses a washing machine that can perform optimal washing according to the dirt level of the laundry and the water temperature of the washing water.

[0003] The washing machine described in Patent Document 1 includes a drum, a detergent automatic feeder, and a dirt detection unit. The dirt level of the laundry is determined by the signal of the dirt detection unit. When the dirt level is above a predetermined value, additional detergent is added and the washing time is extended.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the washing machine described in Patent Document 1, neither the disclosure nor the suggestion is made regarding the effect of the treatment agent containing the auxiliary agent.

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

Means for Solving the Problems

[0007] A washing machine according to one aspect of the present disclosure includes a washing tub configured to accommodate 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 unit, wherein the control unit causes the treatment agent supply device to supply the first treatment agent, supplies water to the water supply device, and performs a washing operation with water containing the first treatment agent, and after the first washing operation, causes the treatment agent supply device to supply the second treatment agent, and performs a washing operation with water containing the first and second treatment agents.

[0008] A washing system according to one aspect of the present disclosure is a washing system comprising a washing machine and a processing device that communicates with the washing machine via a network, wherein the washing machine comprises a washing tub configured to accommodate laundry, a water supply device for supplying water to the washing tub, a processing agent supply device for supplying a first processing agent or a second processing agent to the washing tub, a control unit for executing a washing course, and a first communication unit for receiving the operating conditions of the washing course via a network, and the processing device comprises a processing unit for storing the operating conditions of the washing course and a second communication unit for transmitting the operating conditions of the washing course via a network, wherein the washing course comprises a first washing step in which the processing agent supply device is supplied with a first processing agent, the water supply device is supplied with 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 is supplied with a second processing agent, and a washing operation is performed with water containing the first and second processing agents. [Effects of the Invention]

[0009] According to this disclosure, a washing machine can be provided that improves the effectiveness of the supplied processing agent. [Brief explanation of the drawing]

[0010] [Figure 1] Schematic front view of the washing machine according to Embodiment 1 of this disclosure [Figure 2] schematic cross-section of a washing machine [Figure 3] Perspective view of the automatic dispensing unit and manual dispensing case. [Figure 4] Schematic diagram of automatic feeding unit and manual feeding case. [Figure 5]Flowchart of the first course of the washing machine [Figure 6] Flowchart of the main washing process [Figure 7] Flowchart of the pre-washing process [Figure 8] Diagram showing the operation in the pre-washing process [Figure 9] Flowchart of the main washing process [Figure 10] Diagram showing the operation in the pre-washing process according to Modification 1 [Figure 11] Flowchart of the first course of the washing machine according to Modification 2 [Figure 12] Block diagram of the washing system according to Embodiment 2 of the present disclosure

Mode for Carrying Out the Invention

[0011] (Embodiment 1) The washing machine 1 according to Embodiment 1 of the present disclosure will be described.

[0012] FIG. 1 is a schematic front view of the washing machine 1 according to Embodiment 1 of the present disclosure. FIG. 2 is a schematic cross-sectional view of the washing machine 1.

[0013] The washing machine 1 according to Embodiment 1 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 channel 13, a circulation pump 14, a fabric quantity detection unit 15 (FIG. 2), a control unit 16, and an operation unit 17.

[0014] The washing machine I further includes an automatic input unit 6, a manual input case 7, and a connection channel 8, and supplies the treatment agent to the outer tub 3. The treatment agent is used when treating clothes, towels, sheets, etc. in the washing machine 1. The treatment agent in Embodiment may be in a liquid state. Note that the treatment agent is not limited to a liquid state, 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 freely openable and closable door 21 that covers the opening 20 are provided on the front surface of the housing 2.

[0016] The outer tub 3 is provided inside the housing 2 and is a generally cylindrical member having a function of storing washing water. The outer tub 3 may also be referred to as a water tub or a tub. The outer tub 3 is provided with 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. Also, a shaft passing through the center of the bottom of the outer tub 3 is taken as the central axis V0. The outer tub 3 is arranged to be inclined such that the central axis V0 has an angle with respect to the horizontal.

[0017] The drum 4 is provided inside the outer tub 3 so as to be rotatable around the central axis V0 and is a generally cylindrical member capable of accommodating laundry. The drum 4 may also be referred to as a washing tub, an inner tub, or a storage tub. A number of through-holes 40 are formed in the drum 4, and the through-holes 40 communicate the drum 4 with the outer tub 3. The drum 4 is provided with an opening 41 at a position facing the opening 20 of the housing 2 and the opening 31 of the outer tub 3. When the user opens the door 21, laundry can be put into the drum 4 through the openings 20, 31, and 41.

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

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

[0020] The treatment agent supplied from the tank of the automatic dispensing unit 6 to the outer tub 3 includes the main detergent (second treatment agent) and an auxiliary agent (first treatment agent). The main detergent is a treatment agent for removing ordinary dirt and is supplied to the outer tub 3 during the main washing process. The main detergent is a treatment agent that removes dirt through actions such as penetration, wetting, emulsification, solubilization, and dispersion. In Embodiment 1, the main detergent is a detergent that disperses dirt. The auxiliary agent is a treatment agent that assists the effect of the main detergent and is supplied to the outer tub 3 during the pre-wash process performed before the main washing process. In Embodiment 1, the auxiliary agent is a treatment agent that exerts its effect by penetrating the laundry or an agent that exerts its effect by dispersing in the washing liquid. Specifically, the auxiliary agent is a fiber protectant such as a pilling prevention agent or shrinkage prevention agent, a color transfer prevention agent, a re-soiling prevention agent, a bleaching agent, a fragrance, a water softener, an alkaline agent, or an enzyme or surfactant that disperses or alters dirt. In other words, this detergent and its auxiliary agents are treatment agents with different roles, such as further enhancing basic performance like cleaning or adding new performance characteristics.

[0021] Performing a pre-wash before the main wash can enhance the processing capacity of the laundry. For example, it can increase the cleaning power of the main detergent to more effectively remove dirt from the laundry, reduce water hardness to prevent a decrease in cleaning power, suppress pilling, fuzzing, and fiber shrinkage during washing, and prevent the reattachment of dirt that has already been removed. The pre-wash is performed in conjunction with the main wash, for example, to remove stubborn stains such as collar and cuff stains or food spills that require pre-care treatment before washing, or to prevent pilling and fuzzing of clothes in subsequent washes.

[0022] The manual dispensing case 7 is a container for the user to manually add one dose of the treatment agent each time the washing machine 1 is run. The manually added treatment agent is supplied to the outer tub 3 in the amount added.

[0023] The connecting channel 8 connects the automatic dispensing unit 6 and the manual dispensing case 7 to the outer tank 3. Therefore, water and treatment agents flow into the outer tank 3 from the automatic dispensing unit 6 or the manual dispensing case 7 through the connecting channel 8. Since the automatic dispensing unit 6 and the manual dispensing case 7 are located above the outer tank 3, the connecting channel 8 extends downward.

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

[0025] The drain valve 11 is an openable and closable valve that, when opened, drains the water stored in the outer tank 3 to the outside of the outer tank 3. The drain valve 11 is located below the outer tank 3. Alternatively, another drainage device may be provided to drain water from the drum 4 instead of the drain valve 11.

[0026] The water level sensor 12 is installed inside the outer tank 3 and detects the water level in the outer tank 3.

[0027] Returning to Figure 1, the circulation channel 13 is located inside the housing 2 and connected to the outer tank 3. Specifically, both the suction port 13a and the discharge port 13b of the circulation channel 13 are connected to the outer tank 3, circulating the water in the drum 4. The suction port 13a is connected to the lower part of the outer tank 3, and the discharge port 13b is connected to the upper part of the outer tank 3. The circulation channel 13 is connected to the drum 4 via the outer tank 3.

[0028] The circulation pump 14 is installed in the circulation channel 13 and has a pump that generates a flow of water in the circulation channel 13. The circulation pump 14 generates a flow of water from the suction port 13a to the discharge port 13b.

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

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

[0031] Memory 16a is a recording medium for storing various information and control programs, and may also function as a work area for the control unit 16. Memory 16a can be implemented as, for example, flash memory, SSD (Solid State Device), hard disk, RAM, other storage devices, or a combination thereof as appropriate.

[0032] Memory 16a stores the operating conditions for the washing cycle performed by the washing machine 1, namely the pre-wash cycle, the main wash cycle, the rinse cycle, and the spin-dry cycle. Specifically, memory 16a stores the operating conditions for the drive unit 5, the automatic dispensing unit 6, the opening and closing conditions for the water supply valve 10, the opening and closing conditions for the drain valve 11, and the operating conditions for the circulation pump 14 for each cycle.

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

[0034] The control unit 17 is the part of the washing machine 1 that is operated by the user. The control unit 17 may consist of one or more buttons, or it may consist of a liquid crystal touch panel. The control unit 17 includes a start button or a display that functions as a start button. In response to operations on the control unit 17, the control unit 16 controls the washing machine 1.

[0035] The user can set information regarding the washing course to be executed by the washing machine 1 via the control unit 17. Specifically, the user can set the type of washing course to be executed by the washing machine 1. Furthermore, if the user wants to execute a washing course under conditions different from those stored in memory 16a, the user can manually input and set the operating conditions for the washing course. In addition, the user can set the type of processing agent by inputting the type of processing agent contained in the automatic dispensing unit 6 via the control unit 17. The user may also set the type of processing agent before using the washing machine 1, or when filling or replenishing the processing agent in tanks 62A to 62C. The set type of processing agent is stored in memory 16a.

[0036] Next, we will describe the more detailed structure of the automatic feeding unit 6. Figure 3 is a perspective view of the automatic feeding unit 6. Figure 4 is a schematic diagram of the automatic feeding unit 6.

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

[0038] Case 61 is a container with an open top to accommodate the three tanks 62A to 62C and the manual dispensing case 7. The pump mechanisms 63A, 63B, and 63C, the treatment agent discharge channel 64, and the water supply valve 10 are connected to the back surface 57 of Case 61.

[0039] As shown in Figure 4, case 61 has a flow path for water and treatment agents below tanks 62A to 62C and manual input case 7. Although Figure 4 illustrates one tank 62A and one pump mechanism 63A, the other tanks 62B to 62C and pump mechanisms 63B to 63C have a similar configuration.

[0040] Returning to Figure 3, tanks 62A to 62C are containers for storing processing agents such as auxiliary agents and main washing agents (i.e., detergents), and are housed in case 61 in an arrangement along the outer K1 (horizontal direction away from the central axis V0 in Figure 1). The depth and volume of the three tanks 62A to 62C increase along the outer K1. Therefore, considering the types of processing agents and the volumes of tanks 62A to 62C, the processing agents may be stored in tanks 62A to 62C in order from those used less frequently. For example, auxiliary agents may be stored in tank 62A, fabric softener in tank 62B, and detergent in tank 62C. On the other hand, different types of auxiliary agents may be stored in two or more of the tanks 62A to 62C. Tanks 62A to 62C are removable from case 61 so that they can be replenished when the amount of processing agent remaining is low.

[0041] The pump mechanisms 63A, 63B, and 63C are devices that draw a predetermined amount of treatment agent from tanks 62A, 62B, and 62C, respectively, and discharge it into the treatment agent discharge channel 64.

[0042] Below the pump mechanisms 63A to 63C, a treatment agent discharge channel 64 is connected. The treatment agent discharge channel 64 is a channel member whose inlet and outlet are connected to the case 61, and it combines the water flowing in from the case 61 with the treatment agent discharged from the pump mechanisms 63A to 63C and returns it to the case 61.

[0043] Next, we will explain the flow of water and treatment agents related to the automatic dispensing unit 6.

[0044] First, let's explain the water supply. The water supplied from the water supply valve 10 flows into the case 61 from the top and falls towards the bottom of the case 61. As shown in Figure 4, the water passes along the bottom of the case 61, below the tanks 62A to 62C, and is supplied to the outer tank 3 via the connecting channel 8. Some of the water passes from the case 61 through the treatment agent discharge channel 64, flows back into the case 61, and is then supplied to the outer tank 3 via the connecting channel 8.

[0045] Next, the flow of the treatment agent will be explained. The treatment agent is drawn out laterally from the tank 62A by the pump mechanism 63A and discharged downward toward the treatment agent discharge channel 64. In the treatment agent discharge channel 64, the treatment agent merges with the water that flows into the treatment agent discharge channel 64 from the case 61, flows along the slope of the treatment agent discharge channel 64, and flows into the case 61. After that, the treatment agent is supplied to the outer tank 3 together with the water via the connecting channel 8. In other words, the treatment agent is supplied to the outer tank 3 by the water flow generated when water is supplied.

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

[0047] As preparation, the user puts the dirty laundry into drum 4. The user sets the desired washing course via the control panel 17. One of the washing courses that the washing machine 1 will execute is the first course. The first course is a standard washing course performed to remove dirt from the laundry.

[0048] <Course 1> Here, we will explain the first course in more detail with reference to Figure 5. Figure 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 to obtain the operating conditions for the first course.

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

[0050] As shown in Figure 5, first, the control unit 16 determines whether or not the type of auxiliary agent has been set (S11). Specifically, the control unit 16 refers to the memory 16a to determine whether or not the type of auxiliary agent has been set. For example, if the type of processing agent has been entered by the user, the control unit 16 determines that the type of auxiliary agent has been set, and if the type of processing agent has not been entered, the control unit 16 determines that the type of auxiliary agent has not been set.

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

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

[0053] Next, the control unit 16 performs a rinsing process (S14) and a dewatering process (S15), completing the first course. In the rinsing process, water is supplied to the outer tub 3, and the drum 4 is rotated to rinse the laundry. Fabric softener may also be supplied to the outer tub 3 along with the water during the rinsing process. In the dewatering process, 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 dewater it.

[0054] In each process, the operation unit 17 displays the currently ongoing process. For example, during the pre-wash process (S13-1) or the main wash process (S12, S13-2), "Washing Process" is displayed on the operation unit 17; during the rinsing process (S14), "Rinsing Process" is displayed; and during the dewatering process (S15), "Dewatering Process" is displayed. On the other hand, during the pre-wash process (S13-1), "Pre-wash Process" may be displayed on the operation unit 17, and during the main wash process (S12, S13-2), "Main Wash Process" may be displayed.

[0055] Now, the main washing process (S12) will be explained with reference to Figure 6. Figure 6 is a flowchart of the main washing process (S12).

[0056] <Course 1: Main washing process (S12)> As shown in Figure 6, first the control unit 16 acquires the weight of the laundry detected by the fabric quantity detection unit 15 (S20).

[0057] Next, the control unit 16 determines the water level for the main wash process (S12) in the outer tub 3, i.e., the main wash water level L1, based on the acquired weight of the laundry (S21). The water level in the outer tub 3 decreases as the drum 4 rotates and water soaks into the laundry. By supplying more water, the water soaks into the laundry completely and the water level stops decreasing. The main wash water level L1 is the water level after the water has completely soaked into the laundry and the water level stops decreasing. Specifically, the control unit 16 refers to the memory 16a to acquire the weight level of the laundry, including the acquired weight of the laundry. The weight level is a range of weights, including, 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 the weight level and the water level, and the control unit 16 refers to 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 weight of the acquired laundry (S22). Specifically, the control unit 16 determines the amount of detergent to be supplied based on the main wash water level L2 determined based on the weight of the acquired laundry. Memory 16a stores the correspondence between water level and detergent supply amount, and the control unit 16 refers to memory 16a to determine the amount of detergent to be supplied corresponding to the main wash water level L2. On the other hand, if the user sets the detergent supply amount to "more" or "less," the supply amount may be changed from the standard setting to the "more" or "less" setting.

[0059] Next, the control unit 16 turns on the drive unit 5 to rotate the drum 4 (S23). This operation, along with the subsequent supply of water and detergent, enables the rotation, agitation, and beating of the laundry. In this washing process (S12), the first rotation time J1 of the drum 4 is, for example, 9 minutes, and the first drum rotation speed R1 is, for example, 45 rpm. The drive unit 5 repeats, for example, a rotation of 12 seconds (ON) followed by a 1 second stop (OFF) for 9 minutes.

[0060] Next, the control unit 16 determines a first opening time T1 for opening the water supply valve 10 based on the main wash water level L1 and the amount of water supplied to the washing machine 1 per unit time, opens the water supply valve 10, and supplies water to the drum 4 (S24). Specifically, the control unit 16 divides the 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 detergent (main detergent) from the tank 62C and supply detergent to the drum 4 (S25). In Embodiment 1, the detergent is supplied simultaneously with the water supply. Alternatively, the detergent supply may be staggered relative to the water supply.

[0062] Next, the control unit 16 determines whether the water level in the outer tank 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 greater than the main wash water level L1.

[0063] If the water level in the outer tank 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 water level in the outer tank 3 has not reached the main wash water level L1 (No in S26), the control unit 16 returns to the step before 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 ensures that the detergent is uniformly mixed with the water, and that the uniformly mixed detergent solution is more easily applied to the laundry. The circulation pump 14 operates intermittently, for example, with a ratio of stop time to operating time of 1:1. The first pump rotation speed V1 of the circulation pump 14 in this washing process (S12) is, for example, 4000 rpm.

[0066] Next, after a predetermined time has elapsed since the drive unit 5 and the circulation pump 14 were turned ON, the control unit 16 turns OFF the drive unit 5 and the circulation pump 14 (S29), and ends the main washing process (S12).

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

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

[0069] Next, the control unit 16 determines the water level for the main washing process (S13-2), i.e., the main washing water level L2 (second water level), based on the weight of the acquired laundry, 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 weight of the acquired laundry, similar to step S22 (S32).

[0071] The amount of detergent supplied may be the same as the amount of detergent supplied in the main washing process (S22) when the pre-washing process is not performed. Alternatively, the amount of detergent supplied may be less than the amount of detergent supplied in the main washing process (S12) when the pre-washing process is not performed, taking into account that auxiliary agents are supplied in advance. Since auxiliary agents can alter or decompose dirt, sufficient cleaning can be achieved even with a smaller amount of detergent supplied. Alternatively, the amount of detergent supplied may be more than the amount of detergent supplied in the main washing process (S12) when the pre-washing process is not performed. For example, by adding an antifoaming agent as an auxiliary agent, the detergent will not foam excessively in the main washing process, so the amount of detergent supplied can be increased. For example, by adding a fiber protectant (e.g., silicone) as an auxiliary agent, damage caused by the detergent can be reduced, so the amount of detergent supplied can be increased.

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

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

[0074] Examples of auxiliary agents include those that exert their effect by uniformly penetrating the laundry or dirt, and those that exert their effect at high concentrations. Embodiment 1 focuses on auxiliary agents that exert their effect by uniformly penetrating the laundry or dirt. When the laundry is surrounded by a large amount of water, the auxiliary agents contained in the water can more easily penetrate the laundry or dirt uniformly. Therefore, in the pre-washing process according to Embodiment 1, a large amount of water is supplied into the drum 4. Specifically, the pre-wash water level L3 in the pre-washing process is equal to or greater than the main wash water level L2 in the main wash process (S13-2). On the other hand, both water levels L2 and L3 are smaller than the maximum water level Lmax at which water overflows from the drum 4.

[0075] Furthermore, by raising the pre-wash water level L3, it is possible to avoid the circulation pump 14 drawing in air instead of water (so-called air lock) when the power of the circulation pump 14 is increased. Therefore, by increasing the power of the circulation pump 14, more water and additives can be applied to the laundry, and more of the additives can be penetrated into the laundry or dirt.

[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 exerts its effect on its own at the pre-wash water level L3. Alternatively, the control unit 16 may determine the amount of auxiliary agent to be supplied based on, for example, only the type of auxiliary agent.

[0077] Next, the control unit 16 turns on the drive unit 5 to rotate the drum 4 (S36). This operation, along with the subsequent supply of water and additive, ensures that the water and additive are uniformly mixed, allowing the additive to act evenly on the laundry. Step S36 may be omitted.

[0078] Next, the control unit 16 determines a second opening time T2 for opening the water supply valve 10 based on the pre-wash water level L3 and the water supply amount, 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, after 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, it is possible to suppress the auxiliary agent from directly adhering to the laundry and to suppress the auxiliary agent from damaging the laundry.

[0080] The supply of the auxiliary agent increases the concentration of the auxiliary agent in drum 4. On the other hand, the auxiliary agent in Embodiment 1 is a treatment agent that decomposes over time. Therefore, the concentration of the auxiliary agent in drum 4 gradually decreases over time.

[0081] Next, the control unit 16 determines whether the water level in the outer tank 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 greater than the pre-wash water level L3.

[0082] If the water level in the outer tank 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 water level obtained in the outer tank 3 has not reached the pre-wash water level L3 (No in S39), the control unit 16 returns to the step before S39.

[0084] If step S36 is omitted, the control unit 16 may turn on the drive unit 5 and rotate the drum 4 for a predetermined time after step S39, that is, after supplying the auxiliary agent. This operation also ensures that the water and auxiliary agent are mixed uniformly, and that the auxiliary agent acts 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, it draws the water in the drum 4 into the circulation channel 13, causing the water level in the outer tank 3 to drop. On the other hand, after a certain amount of time has passed since the circulation pump 14 was turned on, the amount of water drawn into the circulation channel 13 and the amount of water flowing out of the circulation channel 13 balance out, and the water level in the outer tank 3 stabilizes.

[0086] Next, the control unit 16 drives the pump mechanism 63A to discharge the auxiliary agent from the tank 62A and supply additional 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 and supplies additional water to the drum 4 (S43). Through this operation, the auxiliary agent discharged from the tank 62A can be reliably supplied to the drum 4. Steps S42 and S43 may be started at different timings or simultaneously.

[0087] By supplying additional auxiliary agents, the concentration of auxiliary agents in drum 4 is restored. Therefore, the concentration of auxiliary agents in drum 4 can be maintained within the range in which the auxiliary agents can exert their effects.

[0088] The additional supply of the auxiliary agent is performed at predetermined time intervals. The predetermined time is set, for example, based on the decomposition rate of the auxiliary agent; the predetermined time is set shorter if the decomposition rate is high, and longer if the decomposition rate is low. This operation makes it possible to maintain the concentration of the decomposing auxiliary agent. In Embodiment 1, the additional supply of the auxiliary agent is performed twice at predetermined time intervals. Alternatively, the additional supply of the auxiliary agent may be performed any number of times at arbitrary intervals.

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

[0090] Throughout the pre-washing process, the concentration of the auxiliary agent in the drum 4 is maintained within a range in which the auxiliary agent can exert its effect, allowing the auxiliary agent to penetrate evenly into the laundry in the drum 4 or to disperse the dirt on the laundry.

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

[0092] <Course 1: Main washing process (S13-2)> As shown in Figure 9, first, since 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 Embodiment 1, 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 creates room to supply water to the drum 4 in the main wash process (S13-1) after draining. For example, after draining, there is room to supply water to the drum 4 to supply detergent in the main wash process (S13-1). In other words, this draining prevents the water level in the outer tank 3 from exceeding the maximum water level Lmax even when water is supplied to the drum 4 in the main wash process (S13-1), and prevents water from overflowing from the drum 4.

[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 fallen below the main wash water level L2, and closes the drain valve 11 when the acquired water level falls below the main wash water level L2. Alternatively, the control unit 16 may, for example, acquire the flow velocity of the flow through the drain valve 11 in advance, calculate the drainage time to open the drain valve 11 based on the flow velocity and the amount of water drained, and close the drain valve 11 when the drainage 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, enables the rotation, agitation, and beating of the laundry. The second rotation time J2 of the drum 4 in the main washing process (S13-2) is shorter than the first rotation time J1 in the main washing process (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 washing process (S12), and the drive unit 5 repeats, for example, 10 seconds of rotation (ON) and 2 seconds of stopping (OFF) for 3 minutes. The rotation of the drum 4 contributes to the damage to the laundry; the longer the rotation time of the drum 4 or the larger the ON ratio of the ON-OFF distribution of the drive unit 5, the greater the degree of damage, while the shorter the rotation time of the drum 4 or the smaller the ON ratio reduces the damage. Furthermore, the second drum rotation speed R2 of drum 4 in the main washing process (S13-2) is smaller than the first drum rotation speed in the main washing process (S12), and may be, for example, 35 rpm.

[0095] Next, the control unit 16 determines a third opening time T3 for opening the water supply valve 10 based on the main wash water level L2 and the water supply amount, 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 detergent (main detergent) from the tank 62C and supply detergent to the drum 4 (S53). In Embodiment 1, the third opening time T3 is set to match the time it takes to drive the pump mechanism 63C. On the other hand, the third opening time T3 may be made relatively longer than the time it takes to drive the pump mechanism 63C, or the end time of the third opening time T3 may be made relatively later than the end time it takes to drive the pump mechanism 63C. In this case, the water supply will end after the end of the pump mechanism 63C's operation. This operation makes it easy to drain the detergent supplied by automatic dispensing into the outer tank 3, and prevents the detergent from accumulating or solidifying upstream of the outer tank 3. Also, if the time it takes to drive the pump mechanism 63A in step S54 described later is longer than the time it takes to drive the pump mechanism 63C, the third opening time T3 may be set to match the time it takes to drive the pump mechanism 63A.

[0097] In Embodiment 1, the supply of detergent is started simultaneously with the supply of water, but the start of the detergent supply may be delayed relative to the start of the water supply.

[0098] Next, the control unit 16 drives the pump mechanism 63A to discharge the auxiliary agent from the tank 62A and supply additional auxiliary agent to the drum 4 (S54). In Embodiment 1, the control unit 16 determines the amount of auxiliary agent to be supplied according to the amount of water drained in step S50. Specifically, if the amount of water drained is large, the amount of auxiliary agent supplied will be large, and if the amount of water drained is small, the amount of auxiliary agent supplied will be small. 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 Embodiment 1, the supply of the auxiliary agent is started simultaneously with the supply of the detergent, but the start of the supply of the auxiliary agent may be delayed relative to the start of the supply of the detergent.

[0100] Next, the control unit 16 determines whether the water level in the outer tank 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 greater than the main wash water level L2.

[0101] If the water level in the outer tank 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 water level acquired in the outer tank 3 has not reached the main wash water level L2 (No in S55), the control unit 16 returns to the step before 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 ensures that the detergent and auxiliary agents are uniformly mixed with the water, and that the detergent and auxiliary agents act uniformly on the laundry. The circulation pump 14 operates intermittently, for example, with a ratio of stop time to operating time of 1:1. The second pump rotation speed V2 of the circulation pump 14 in the main washing process (S13-2) is smaller than the first pump rotation speed V1 in the main washing process (S12), and may be, for example, 2500 rpm.

[0104] When an auxiliary agent that alters and decomposes dirt is used as an auxiliary agent, the effectiveness of the detergent is improved, and in the operation of steps S56 and S57, the mechanical force of the washing machine 1 can be reduced compared to the main washing process (S12). As described above, mechanical force is a 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 Embodiment 1, 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 be changed.

[0105] Next, after a predetermined time has elapsed since the drive unit 5 and the circulation pump 14 were turned ON, the control unit 16 turns OFF the drive unit 5 and the circulation pump 14 (S58), and ends the main washing process (S13-2).

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

[0107] Here, we will explain an example of the second course, highlighting its differences from the first course.

[0108] Specifically, in the step of turning on the drive unit 5 in step S23 of the main washing process (S12) and step S51 of the main washing process (S13-2), in the second course, the drum 4 performs rocking agitation instead of rotational agitation. Rocking agitation is the motion of the drum 4 rocking 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, and this cycle is repeated.

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

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

[0111] (summary) To summarize the above explanation, the features of this disclosure are described below.

[0112] The washing machine 1 according to Embodiment 1 performs a pre-wash step before the main wash step. Performing a pre-wash step enhances the effectiveness of the detergent used in the main wash. Furthermore, the water supplied to the drum 4 during the pre-wash step is not completely drained, and the main wash step is performed with some water remaining in the drum. Therefore, the auxiliary agent supplied to the drum 4 during the pre-wash step remains in the drum 4 during the main wash step, allowing the auxiliary agent to exert its effects during the main wash step as well.

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

[0114] Since the auxiliary agent is a treatment agent that decomposes over time, the concentration of the auxiliary agent can be maintained within the range in which it can exert its effect by supplying additional auxiliary agents. Therefore, the effect of the auxiliary agent can be maintained throughout the pre-washing process.

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

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

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

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

[0119] This configuration allows for the determination of the appropriate water level based on the type of additive and the weight of the laundry, while indirectly referring to the weight of the laundry. Therefore, during the pre-washing process, the concentration of the additive can be maintained within the appropriate range, and the effect of the additive on the laundry can be enhanced.

[0120] In the washing machine 1 of Embodiment 1, the detergent is a different type of processing agent from the auxiliary agent.

[0121] This configuration enhances the effectiveness of the detergent compared to simply increasing the amount of detergent supplied.

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

[0123] This configuration allows the laundry to be surrounded by a large amount of water, making it easier for the additive to act evenly on the clothes.

[0124] The washing machine 1 of Embodiment 1 further includes a drain valve 11 (drain device) configured to selectively drain water from the drum 4. After the pre-washing process is completed, the control unit 16 further executes a draining step (S50) in which the drain valve 11 drains a portion of the water from the drum 4.

[0125] This configuration makes it possible to prevent water from overflowing from the drum 4 during the main washing process (S13-2).

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

[0127] This configuration further suppresses water overflow from drum 4 during the main washing process (S13-2).

[0128] In the washing machine 1 of Embodiment 1, after the pre-washing process is completed, the control unit 16 causes the automatic dispensing unit 6 to supply additional auxiliary agents according to the amount of water drained by the drain valve 11.

[0129] This configuration allows for the replenishment of the additive discharged from drum 4 by wastewater.

[0130] In the washing machine 1 of Embodiment 1, the pre-washing step includes a step (S42) in which an automatic dispensing unit 6 supplies additional auxiliary agents after the supply of an auxiliary agent.

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

[0132] In the washing machine 1 of Embodiment 1, the pre-washing step includes the step of supplying additional water after supplying the auxiliary agent (S43), and the step of the automatic dispensing 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 reaches the drum 4 more reliably. In addition, the concentration of the auxiliary agent can be maintained even when additional water is supplied to replenish the water absorbed by the laundry and adjust the water level.

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

[0135] This configuration allows for the maintenance of the adjuvant's concentration and restoration of its effect through additional supply.

[0136] The washing machine 1 of Embodiment 1 further includes an operating unit 17 on which the type of auxiliary agent can be set. Depending on whether the type of auxiliary agent is set or not, the control unit 16 determines whether to execute the main washing process (S12) or the main washing process (S13-2) (washing conditions for the main washing process).

[0137] With this configuration, if an auxiliary agent is set, a pre-wash process is executed, making it easier to remove dirt. In this case, the operating conditions for the main wash process (S13-2) can be reduced in load or shortened compared to the operating conditions for the main wash process (S12). This operation reduces damage to the laundry and further contributes to energy savings for the washing machine 1.

[0138] In the washing machine 1 of Embodiment 1, if the type of auxiliary agent is set, the control unit 16 reduces the mechanical force of the main washing process (S13-2).

[0139] This configuration helps to prevent damage to laundry caused by combined washing.

[0140] The washing machine 1 of Embodiment 1 further includes a circulation channel 13 to which an inlet 13a and an outlet 13b are connected to an outer tub 3, and a circulation pump 14 provided in the circulation channel 13 for circulating water in the drum 4. Reducing the mechanical force in this washing process (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 further reduces damage to laundry caused by combined washing.

[0142] This disclosure is not limited to Embodiment 1, and can be implemented in various other forms.

[0143] In Embodiment 1, an example was described in which the central axis V0 of the outer tub 3 is inclined to have an angle with respect to the horizontal, but the invention is not limited to this. For example, the washing machine 1 may be a top-loading washing machine, and the central axis V0 of the outer tub 3 may extend in the vertical direction.

[0144] Although the example described involves the automatic dispensing unit 6 and manual dispensing case 7 supplying a liquid treatment agent to the outer tank 3, the method is not limited to this. For example, the automatic dispensing unit 6 or manual dispensing case 7 may supply a powdered treatment agent or a solid treatment agent such as a tablet to the outer tank 3.

[0145] In Embodiment 1, an example was described in which the treatment agent is supplied by water supply, but the invention is not limited to this. The treatment agent may be supplied at a different timing than the water supply. For example, the treatment agent may be discharged directly into the drum 4.

[0146] In Embodiment 1, an example was described in which the treatment agent is supplied by the automatic dispensing unit 6 during the pre-washing and main washing processes, but the invention is not limited to this. The treatment agent may also be supplied manually.

[0147] In Embodiment 1, an example was described in which the cleaning agent is a single detergent, but the invention is not limited to this. 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 weakly 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 or neutral detergent and the auxiliary agent is alkaline, the cleaning power can be improved. Also, if the cleaning agent is an alkaline detergent and the auxiliary agent is a bleaching agent, the disinfecting effect can be improved.

[0148] In Embodiment 1, an example was described in which the auxiliary agent is a treatment agent that exerts its effect by penetrating the laundry or a treatment agent that disperses dirt, but it is not limited to this. The auxiliary agent may also be a treatment agent that exerts its effect at a high concentration, as will be described in Modification 1 below. In this case, the pre-wash water level L3 in the pre-wash step is lower than the main wash water level L2 in the main wash step (S13-2).

[0149] In Embodiment 1, an example was described in which the main cleaning agent and the auxiliary agent are different types of treatment agents, but the invention is not limited to this. The main cleaning agent and the auxiliary agent may have one or more common components. The main cleaning agent and the auxiliary agent may have, for example, a common enzyme, a re-deposition inhibitor, a water softener, etc. The main cleaning agent and the auxiliary agent may be the same.

[0150] In Embodiment 1, an example was described in which the fabric quantity detection unit 15 detects the weight of the laundry, but the invention is not limited to this. For example, the fabric quantity detection unit 15 may detect other physical quantities that indicate the amount of laundry, such as the volume of the laundry.

[0151] In Embodiment 1, an example was described in which 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, the invention is not limited to this. The water levels L1, L2, and L3 may be predetermined values.

[0152] In Embodiment 1, an example was described in which the control unit 16 determines the pre-wash water level L3 based on the type of auxiliary agent and the main wash water level L2, but the system is not limited to this. The control unit 16 may also determine the pre-wash water level L3 based on the type of auxiliary agent and the weight of the laundry detected by the fabric load detection unit 15.

[0153] In Embodiment 1, an example was described in which the auxiliary agent decomposes over time, but the invention is not limited to this. An auxiliary agent that does not decompose over time may be used. In this case, the additional supply of the auxiliary agent (S42) and the additional water supply (S43) may be omitted.

[0154] In Embodiment 1, an example was described in which only the auxiliary agent contained in tank 62A is supplied during the pre-washing process, but the invention is not limited to this. For example, in the additional supply of auxiliary agent (S42), other auxiliary agents may be supplied in place of or in addition to the auxiliary agent contained in tank 62A.

[0155] In Embodiment 1, an example was described in which the main washing step (S13-2) is performed after the pre-washing step, but the invention is not limited to this. For example, the main washing step (S12) may be performed after the pre-washing step.

[0156] In Embodiment 1, an example was described in which the suction port 13a of the circulation channel 13 is located at the bottom of the drum 4, but the invention is not limited to this. For example, the suction port 13a may be located at a position above the bottom. In such a configuration, when the circulation pump 14 is turned ON and the circulation pump 14 draws up water from inside the drum 4, and the water level in the outer tank 3 falls below the suction port 13a, it becomes more likely that the circulation pump 14 will have difficulty drawing 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 makes it easier to avoid air being drawn into the circulation channel 13 instead of water (so-called "air lock").

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

[0158] While examples have been described where the interval for additional supply is set based on the decomposition rate of the auxiliary agent, the method is not limited to this. For example, the interval for additional supply may be set based on the decrease in the concentration of the auxiliary agent due to the consumption of components in the detergent solution that occurs when it penetrates into fibers (cotton, synthetic fibers). Alternatively, the interval for additional supply may be set based on the decrease in the concentration of the auxiliary agent due to the consumption of components in the detergent solution that occurs when it penetrates into dirt (emulsification, etc.).

[0159] In Embodiment 1, an example was described in which the control unit 16 determines whether or not a type of auxiliary agent has been set and, based on that determination, decides whether or not to perform the pre-washing process. However, the invention is not limited to this. For example, as will be described in Modification 2 below, the user may input whether or not to perform the pre-washing process, and the control unit 16 may decide whether or not to perform the pre-washing process based on that input.

[0160] (Variation 1) While Embodiment 1 focuses on a treatment agent that exerts its effect by uniformly penetrating laundry or stains, Modification 1 focuses on an auxiliary agent that exerts its effect at high concentrations. Examples of auxiliary agents in Modification 1 include alkaline agents, enzymes, bleaches, stain modifiers, detergents that remove oily stains, bacterial control agents, and disinfectants.

[0161] Figure 10 shows the operation of the circulation pump 14, pump mechanisms 63A and 63C, water supply valve 10, and drain valve 11 in the pre-washing process in Modification 1. In Figure 10, steps S42 to S43 related to the additional supply of auxiliary agents are omitted.

[0162] The operation of the washing machine 1 in Modification 1 is the same as that of the washing machine 1 in Embodiment 1, unless otherwise specified. The differences from Embodiment 1 will be explained below.

[0163] In step S34, the control unit 16 determines the water level for the pre-wash process, i.e., the pre-wash water level L3, based on the type of auxiliary agent set and the main wash water level L2. In the modified example 1, the auxiliary agent is a treatment agent that exhibits its effect at high concentrations, so it is desirable that the amount of water in the drum 4 during the pre-wash process be small. Therefore, as shown in Figure 10, the pre-wash water level L3 in the pre-wash process is lower than the main wash water level L2 in the main wash process (S13-2). With such a pre-wash water level L3, the concentration of the auxiliary agent in the drum 4 during the pre-wash process can be increased, allowing the auxiliary agent to exert its effect.

[0164] Furthermore, the pre-wash water level L3 is higher than the suction port 13a of the circulation channel 13. In Figure 10, the minimum water level Lmin indicates the height of the suction port 13a of the circulation channel 13, and the pre-wash water level L3 is higher than the minimum water level Lmin. This pre-wash water level L3 makes it easier to avoid the circulation pump 14 drawing in air instead of water (so-called "air lock") 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 agents can be poured over the laundry. Therefore, even if there is a large amount of laundry, the entire load of laundry can be soaked in water and auxiliary agents. In step S41, the water level in the outer tub 3 decreases and stabilizes at a stable water level L5, which is higher than the minimum water level Lmin.

[0166] In the main wash cycle (S13-2) of the washing machine 1 in Modification 1, step S50, i.e., draining after the pre-wash cycle, is omitted. In other words, between the pre-wash cycle and the main wash cycle (S13-2), the control unit 16 maintains the closed state of the drain valve 11. Through this operation, the auxiliary agent supplied in the pre-wash cycle can exert its effect on the laundry in the main wash cycle (S13-2) in the amount supplied. The control unit 16 may also perform the step of acquiring the water level detected by the water level sensor 12 and 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 a third opening 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 supplied in step S52 does not cause water to overflow from the drum 4.

[0168] In Modification Example 1, an example was described in which drainage after the pre-washing process is omitted, but the system is not limited to this. 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 perform the step of opening the drain valve 11 after the pre-washing process.

[0169] (Modification 2) Figure 11 is a flowchart of the first course of the washing machine according to Modification 2. In Modification 2, courses that include a pre-wash step and courses that do not include a pre-wash step are provided as separate courses. In other words, the control unit 16 does not automatically determine whether or not to perform a pre-wash step based on whether or not the type of additive is set. Instead, based on user input, the control unit 16 executes either a course that includes a pre-wash step or a course that does not include a pre-wash step.

[0170] The operation of the washing machine 1 in Modification 2 is the same as that of the washing machine 1 in Embodiment 1, unless otherwise specified. The differences from Embodiment 1 will be explained below.

[0171] Referring to Figure 11, the operation of the washing machine 1 in modified example 2 will be explained. First, the user sets the desired washing course through the control panel 17. Here, courses that include a pre-wash step and courses that do not include a pre-wash step are displayed as separate courses on the control panel 17. Specifically, if the user sets the type of additive, the course that includes a pre-wash step will be displayed as selectable on the control panel 17. On the other hand, if the user does not set the type of additive, the course that includes a pre-wash step will be displayed as unavailable on the control panel 17.

[0172] Next, the control unit 16 determines whether a course including pre-washing has been selected (S101).

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

[0174] If a course including pre-washing is not selected (No in S101), the control unit 16 determines whether a course without pre-washing has been selected (S102).

[0175] If a course that does not include pre-washing is selected (Yes in S102), the control unit 16 executes the main washing process (S12).

[0176] If a course that does not include pre-washing is not selected (No in S102), the control unit 16 terminates its operation. On the other hand, if other courses are available, the control unit 16 may execute one of the other courses.

[0177] (Embodiment 2) A laundry system 201 according to Embodiment 2 of this disclosure will now be described. In Embodiment 2, the differences from Embodiment 1 will be mainly described, and explanations that overlap with Embodiment 1 will be omitted. In Embodiment 2, components that are the same as or equivalent to those in Embodiment 1 will be denoted by the same reference numerals.

[0178] Figure 12 is a block diagram of the washing system 201 of Embodiment 2 according to the present disclosure.

[0179] As shown in Figure 12, the washing system 201 comprises a washing machine 202, a terminal device 222, and a processing device 212.

[0180] The washing machine 202 further includes a first communication unit 204. In Embodiment 2, the washing machine 202 is the same as the washing machine 1 in Embodiment 1 unless otherwise specified.

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

[0182] The terminal device 222 is a device capable of communicating with the washing machine 202 and the processing unit 212. The terminal device 222 is, for example, a smartphone. Alternatively, the terminal device 222 may function as the operation unit 17 in Embodiment 1.

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

[0184] The processing unit 213 stores the operating conditions for the washing course executed by the washing machine 202, namely the pre-wash, main wash, rinse, and spin-dry processes, instead of the memory 16a according to Embodiment 1.

[0185] The second communication unit 214 transmits the operating conditions of the washing machine 202, stored in the processing unit 213, via the network. Specifically, the second communication unit 214 transmits the operating conditions of the washing machine 202 to the terminal device 222 via the network in response to the operation of the terminal device 222. The second communication unit 214 includes a circuit that transmits to the terminal device 222 in accordance with a predetermined communication standard (e.g., LAN, Wi-Fi®, Bluetooth®).

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

[0187] Alternatively, the terminal device 222 may be omitted, and the washing machine 202 and the processing unit 212 may communicate directly.

[0188] [effect] The washing system 201 according to Embodiment 2 can achieve the following effects.

[0189] As described above, the washing system 201 of Embodiment 1 comprises a washing machine 202 and a processing unit 212 that communicates with the washing machine 202 via a network. The washing machine 202 includes a drum 4 configured to accommodate laundry, a water supply valve 10 that supplies water to the drum 4, an automatic dispensing unit 6 that supplies auxiliary agents or detergent to the drum 4, and a control unit 16 that executes a washing course. The washing machine 202 further includes a first communication unit 204 that receives the operating conditions of the washing course via the network. The processing unit 212 includes a processing unit 213 that stores the operating conditions of the washing course and a second communication unit 214 that transmits the operating conditions of 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, the automatic dispensing unit 6 is made to supply auxiliary agents, water is made to supply water to the water supply valve 10, and the washing operation is performed with water containing the auxiliary agents. In the main washing process (S13-2), after the pre-washing process, detergent is supplied to the automatic dispensing unit 6, and the washing operation is performed with water containing the auxiliary agent and detergent.

[0190] This configuration allows users to download different washing courses for the washing machine 202, thereby increasing the variety of courses available. This makes it easier for users to have the washing machine 202 execute a course that suits their needs.

[0191] In Embodiment 2, an example was described in which the washing system 201 comprises a washing machine 202 and a processing unit 212, but it is not limited to this. For example, as shown in Figure 13, the washing system 201 of Modification 3 may further include a terminal device 222. Figure 13 is a block diagram of the washing system 201 of Modification 3. The terminal device 222 is a device that can communicate with the washing machine 202 and the processing unit 212. The terminal device 222 is, for example, a smartphone. The terminal device 222 may also function as the operation unit 17 of Embodiment 1.

[0192] The washing machine in the first embodiment includes a washing tub configured to accommodate 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 unit, the control unit causing the treatment agent supply device to supply the first treatment agent, supplying water to the water supply device, and performing a washing operation with water containing the first treatment agent, and after the first washing operation, causing the treatment agent supply device to supply the second treatment agent, and performing a washing operation with water containing the first and second treatment agents.

[0193] In the second embodiment, the washing machine is further equipped with a fabric load 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 first treatment agent and the amount of laundry detected by the fabric load detection unit.

[0194] In a third embodiment, the washing machine is further equipped with a fabric load detection unit that detects the amount of laundry contained in the washing tub, and the control unit determines the second wash water level in the second washing step based on the amount of laundry detected by the fabric load detection unit, and determines the first wash water level in the first washing step based on the type of first treatment agent and the second wash water level.

[0195] In the fourth embodiment, the washing machine is one of the washing machines in any of the first to third embodiments, and the second treatment agent is a different type of treatment agent from the first treatment agent.

[0196] In the fifth embodiment, the washing machine is such that, in any of the first to fourth embodiments, the water level in the first washing cycle is lower than the water level in the second washing cycle.

[0197] As a washing machine in the sixth embodiment, the washing machine in the fifth embodiment further comprises a circulation channel having an inlet and an outlet connected to a washing tub, and a circulation pump provided in the circulation channel for circulating water in the washing tub, wherein the first wash water level is higher than the inlet of the circulation channel.

[0198] As a washing machine in the seventh embodiment, the washing machine in the fifth or sixth embodiment further comprises a circulation channel having an inlet and an outlet connected to a washing tub, and a circulation pump provided in the circulation channel for circulating water in the washing tub, wherein 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.

[0199] As a washing machine in the eighth embodiment, the washing machine in any of the fifth to seventh embodiments further comprises a drain valve configured to selectively drain water from the washing tub, and between the first washing step and the second washing step, the control unit controls the opening and closing of the drain valve to maintain a closed state.

[0200] As a washing machine in the ninth embodiment, in a washing machine in any of the first to eighth embodiments, the first washing step includes the step of supplying a first treatment agent, after which a treatment agent supply device supplies an additional first treatment agent.

[0201] As a washing machine in the tenth embodiment, in a washing machine in any of the first to ninth embodiments, the first washing step includes the steps of supplying a first treatment agent, the washing tub rotating, and after the rotation, the treatment agent supplying device supplying an additional first treatment agent.

[0202] In the eleventh embodiment, in the washing machine according to any of the first to tenth embodiments, the first washing step includes the steps of supplying additional water with a water supply device after supplying the first treatment agent, and supplying additional first treatment agent with a treatment agent supply device.

[0203] In the washing machine according to the twelfth embodiment, in the washing machine according to any of the first to eleventh embodiments, the first processing agent is a substance that decomposes over time.

[0204] As a washing machine in the 13th embodiment, in a washing machine in any of the 1st to 12th embodiments, the first washing step includes the step of supplying a third processing agent, different from the first processing agent, to the washing tub by a processing agent supply device after supplying a first processing agent.

[0205] In the washing machine according to the 14th embodiment, in the washing machine according to the 13th embodiment, the first washing step includes the step of the washing tub rotating after the supply of the first treatment agent, and the step of the treatment agent supplying device supplying the third treatment agent after the rotation.

[0206] In the 15th embodiment, the washing machine is further provided with an operating unit that allows setting the type of first treatment agent, and the control unit determines the washing conditions for the second washing step depending on whether or not the type of first treatment agent is set.

[0207] In the washing machine according to the 16th embodiment, if the type of first treatment agent is set, the control unit reduces the mechanical force of the second washing step.

[0208] A washing machine in the 17th embodiment further comprises a circulating channel connected to a washing tub, with an inlet and an outlet, and a circulating pump provided in the circulating channel for circulating water in the washing tub, wherein 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 circulating pump.

[0209] The laundry system in the 18th embodiment is a laundry system comprising 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 accommodate laundry, a water supply device for supplying water to the washing tub, a processing agent supply device for supplying a first processing agent or a second processing agent to the washing tub, a control unit for executing a washing course, and a first communication unit for receiving the operating conditions of the washing course via a network, and the processing device has a processing unit for storing the operating conditions of the washing course and a second communication unit for transmitting the operating conditions of the washing course via a network, and the washing course includes a first washing step in which the processing agent supply device is supplied with a first processing agent, the water supply device is supplied with water, and a washing operation is performed with water containing the first processing agent, and after the first washing step, the processing agent supply device is supplied with a second processing agent, and a washing operation is performed with water containing the first and second processing agents.

[0210] While this disclosure is adequately described in relation to preferred embodiments with reference to the accompanying drawings, various modifications and alterations will be obvious to those skilled in the art. Such modifications and alterations should be understood to be included within the scope of the invention as defined by the appended claims. [Industrial applicability]

[0211] The washing machine of this disclosure is useful as a household washing machine, a commercial washing machine, or any type of washer-dryer (e.g., a household drum-type washing machine or a top-loading washing machine) because it can supply an auxiliary agent. [Explanation of symbols]

[0212] 1. Washing machine 2 cabinets 3 Outer tank 4 drums 5 Drive Unit 6. Automatic feeding unit 7 Manual Input Case 8 Connection Channels 10 Water supply valve 11 Drain valve 12 Water level sensor 13 Circulation channels 14 Circulation pump 15 Fabric quantity detection unit 16 Control Unit 17 Control section 61 cases 62A~62C Tank 63A~63C Pump mechanism

Claims

1. A washing tub configured to accommodate laundry, A water supply device for supplying water to the washing tub, A treatment agent supply device that supplies a first treatment agent and a second treatment agent of a different type from the first treatment agent to the washing tub, A fabric quantity detection unit that detects the amount of laundry contained in the washing tub, It comprises a control unit and, The control unit, A first washing step involves supplying the first processing agent to the processing agent supply device, supplying water to the water supply device, and performing a washing operation with water containing the first processing agent. After the first washing step, the second washing step is performed, in which the second processing agent is supplied to the processing agent supply device, and the washing operation is performed with water containing at least a portion of the first processing agent supplied in the first washing step and the second processing agent. A washing machine that determines the second wash water level in the second washing step based on the amount of laundry detected by the fabric quantity detection unit, and determines the first wash water level in the first washing step based on the second wash water level and the type of the first treatment agent.

2. The washing machine according to claim 1, wherein the first wash water level is lower than the second wash water level.

3. The system further comprises a circulation channel connected to the washing tub, with an inlet and an outlet, and a circulation pump provided in the circulation channel for circulating the water in the washing tub. The washing machine according to claim 2, wherein the first wash water level is higher than the suction port of the circulation channel.

4. The system further comprises a circulation channel connected to the washing tub, with an inlet and an outlet, and a circulation pump provided in the circulation channel for circulating the water in the washing tub. The control unit controls the ON / OFF and rotation speed of the circulation pump. The washing machine according to claim 2, wherein the rotation speed of the circulation pump in the first washing step is set based on the first wash water level and the ON time of the circulation pump.

5. The washing machine further comprises a drain valve configured to selectively drain the water in the washing tub, The washing machine according to claim 2, wherein the control unit controls the opening and closing of the drain valve to maintain a closed state between the first washing step and the second washing step.

6. The washing machine according to claim 1, wherein the first washing step comprises a supply step in which the treatment agent supplying device supplies a first treatment agent, which is started before the first washing water level is reached, and an additional supply step in which the treatment agent supplying device supplies an additional first treatment agent, which is started after the first washing water level is reached.

7. The washing machine according to claim 6, wherein the first washing step comprises, after the additional supply step, a step in which the washing tub rotates.

8. The washing machine according to claim 6, wherein the first washing step includes, together with the additional supply step, a step in which the water supply device supplies additional water.

9. The washing machine according to claim 1, wherein the first washing step includes the step of supplying a third treatment agent of a different type from the first treatment agent to the washing tub by the treatment agent supplying device after the supply of the first treatment agent.

10. The washing machine according to claim 9, wherein the first washing step comprises the steps of the washing tub rotating after the supply of the first treatment agent, and the treatment agent supplying device supplying the third treatment agent after the rotation.

11. The device further includes an operating unit that allows setting the type of the first treatment agent, The washing machine according to claim 1, wherein, when the type of the first treatment agent is set, the control unit reduces the mechanical force of the second washing step.

12. The system further comprises a circulation channel connected to the washing tub, with an inlet and an outlet, and a circulation pump provided in the circulation channel for circulating the water in the washing tub. The washing machine according to claim 11, wherein 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.

13. A washing system comprising a washing machine and a processing device that communicates with the washing machine via a network, The aforementioned washing machine, A washing tub configured to accommodate laundry, A water supply device for supplying water to the washing tub, A treatment agent supply device that supplies a first treatment agent and a second treatment agent of a different type from the first treatment agent to the washing tub, A fabric quantity detection unit that detects the amount of laundry contained in the washing tub, A control unit that executes the washing course, It has a first communication unit that receives the operating conditions of the washing course via the network, The aforementioned processing apparatus is A processing unit that stores the operating conditions of the aforementioned washing course, It includes a second communication unit that transmits the operating conditions of the washing course via the network, The aforementioned washing course is A first washing step involves supplying the first processing agent to the processing agent supply device, supplying water to the water supply device, and performing a washing operation with water containing the first processing agent. A second washing step is performed after the first washing step, in which the second processing agent is supplied to the processing agent supply device, and the washing operation is performed with water containing at least a portion of the first processing agent supplied in the first washing step and the second processing agent. Includes, A laundry system in which, based on the amount of laundry detected by the fabric quantity detection unit, the second wash water level in the second washing step is determined, and based on the second wash water level and the type of the first treatment agent, the first wash water level in the first washing step is determined.

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