Washing machine

Abstract

The embodiment of the invention provides a washing machine, and relates to the technical field of clothes washing. The washing drum and the water level sensor are arranged in the box body; the washing drum is connected with the water inlet, and the water inlet is provided with a main washing valve and a flow meter; the controller is electrically connected with the main washing valve, the flow meter and the water level sensor and is configured to execute the following steps that the main washing valve is controlled to be opened, whether the water level information of the side, close to the bottom of the box body, of the washing barrel reaches the preset protection water level or not is detected, if yes, the flow meter is started, and if not, the water level sensor is started; the main washing valve is controlled to be closed when the water inlet amount reaches the preset water amount; the clothes are pre-washed, after pre-washing is finished, information of the remaining water level in the washing drum is obtained, and the material of the clothes is recognized according to the information of the remaining water level. According to the technical scheme provided by the embodiment of the invention, the material identification accuracy of the clothes can be improved.

Description

Technical Field

[0001] This application relates to the technical field of clothing washing. Specifically, it relates to a washing machine. Background Art

[0002] With the popularization of various household appliances, it has brought a lot of convenience to people's lives. The washing machine is one of the common household appliances.

[0003] In the related art, washing machines usually have a variety of washing programs, and the washing parameters corresponding to each washing program are also different. For example, washing time, rotation speed, temperature, number of rinses, etc. By selecting different washing parameters for different materials of clothes, problems such as clothes not being cleaned thoroughly or being over-cleaned can be effectively reduced.

[0004] However, during the use of the above washing machine, especially when selecting a washing program, the user needs to distinguish according to the material of the clothes by himself and manually select the corresponding washing program. At the same time, due to the diversity of the materials of the clothes, there are often large errors in the user's judgment of the materials of the clothes, resulting in it being difficult for the user to select a suitable washing program. Summary of the Invention

[0005] To solve the above technical problems, an embodiment of the present application provides a washing machine.

[0006] According to one aspect of the embodiments of the present application, a washing machine is provided, including: a cabinet; a washing tub and a water level sensor disposed in the cabinet; the washing tub is connected to a water inlet, and the water inlet is provided with a main washing valve and a flow meter; a controller, electrically connected to the main washing valve, the flow meter, and the water level sensor respectively, and configured to perform the following steps: control to open the main washing valve, and detect whether the water level information on the side of the washing tub close to the bottom of the cabinet reaches a preset protection water level. If so, enable the flow meter and control to close the main washing valve when the water inflow reaches a preset water volume; perform pre-washing on the clothes, and after the pre-washing is completed, obtain the remaining water level information in the washing tub, and identify the material of the clothes according to the remaining water level information.

[0007] In the above embodiment, the water inflow below the protection water level is controlled by the detection result of the water level sensor, and the water inflow for calculating the water absorption of the clothes is controlled by the flow meter. Based on the characteristic that the water level sensor can detect the water level information, the washing machine can detect the water inflow for ensuring the safe use of the equipment. Then, based on the characteristic that the flow meter has high control accuracy for the water inflow, the accuracy of judging the material of the clothes is improved.

[0008] In one embodiment of the present application, the washing machine is further provided with a weighing sensor for obtaining the weight of the laundry; the controller is further configured to perform the following steps: obtain the weight of the laundry; determine a preset water volume corresponding to the weight of the laundry according to a preset mapping relationship between the weight of the laundry and the water volume.

[0009] In the above embodiment, by first obtaining the weight of the laundry and then determining the preset water volume corresponding to the weight according to the preset mapping relationship between the weight of the laundry and the water volume, the same type of laundry with different weights can achieve the same water absorption effect, thereby improving the accuracy of laundry material identification.

[0010] In one embodiment of the present application, the controller is further configured to perform the following steps: determine a pre-washing time corresponding to the preset water volume according to a preset mapping relationship between the water inlet volume and the pre-washing time; perform pre-washing on the laundry according to the pre-washing time.

[0011] In the above embodiment, by first obtaining the water inlet volume and then determining the pre-washing time according to the mapping relationship between the water inlet volume and the pre-washing time, where the water inlet volume can represent the weight of the laundry, the heavier the laundry, the more water inlet volume is required, and the more water inlet volume is required, the longer the corresponding pre-washing time is, so that the laundry can fully absorb water and improve the accuracy of laundry material identification.

[0012] In one embodiment of the present application, the controller is further configured to perform the following steps: determine whether the remaining water level information reaches a preset washing water level; if not, control to open the main washing valve for water replenishment until the water level information reaches the washing water level; if so, start washing the laundry.

[0013] In the above embodiment, for different materials of laundry, the degree of water absorption is different. For laundry with stronger water absorption ability, after pre-washing, the remaining water level information detected by the water level sensor is not sufficient to support the subsequent washing process. Therefore, the setting of the washing water level can ensure that the laundry can be normally washed after water absorption, so as to improve the laundry effect during the laundry process.

[0014] In one embodiment of the present application, the water inlet is further provided with a pre-washing valve; the controller is further configured to perform the following steps: before controlling to open the main washing valve, determine whether it is the main washing stage; if so, open the main washing valve, and after the water inlet volume reaches the protection water level, control the water inlet volume to reach the preset water volume according to the flow meter and then close the main washing valve; if not, open the main washing valve and the pre-washing valve simultaneously, and enable the flow meter to control to close the main washing valve and the pre-washing valve when the water inlet volume reaches the preset water volume.

[0015] In the above embodiments, for the non-main washing stage, in addition to controlling the main washing valve to open, it is also necessary to open the pre-washing valve to meet the demand for a small amount of water intake in the function. For such water intake, control cannot be achieved through the detection of the water level sensor. Therefore, a flow meter is required to perform the control of the corresponding water intake.

[0016] In an embodiment of the present application, the controller is further configured to perform the following steps: before simultaneously opening the main washing valve and the pre-washing valve, determine whether it is the softening stage; if so, simultaneously open the main washing valve and the pre-washing valve, and enable the flow meter, and control the flow meter to perform intermittent water intake according to the preset softening water intake and at preset time intervals, and close the main washing valve and the pre-washing valve when the water intake reaches the softening water intake; if not, simultaneously open the main washing valve and the pre-washing valve, and enable the flow meter, and control to close the main washing valve and the pre-washing valve when the water intake reaches the preset water volume.

[0017] In the above embodiments, if it is the softening stage, a small amount of water intake is required for softening the clothes, and intermittent water intake is performed according to the softening water intake to improve the softening effect. If it is not the softening stage, it is the rinsing stage. For the rinsing stage, a large amount of water intake is required for rinsing the clothes, and continuous water intake is performed according to the preset water volume to improve the rinsing efficiency.

[0018] In an embodiment of the present application, the controller is further configured to perform the following steps: determine the target number of control pulses corresponding to the preset water volume according to the mapping relationship between the preset number of control pulses of the flow meter and the water intake; during the process of enabling the flow meter, control to close the main washing valve and the pre-washing valve when the number of control pulses of the flow meter reaches the target number.

[0019] In the above embodiments, since the flow meter is controlled by pulses, the number of control pulses is associated with the water intake, thereby improving the control accuracy of the flow meter.

[0020] In an embodiment of the present application, the controller is further configured to perform the following steps: sequentially obtain the number of control pulses of the flow meter within multiple unit times; accumulate the number of control pulses corresponding to multiple unit times until the total number of control pulses reaches the preset target number.

[0021] In the above embodiments, the control pulses per unit time are counted, and the number of control pulses within multiple unit times is accumulated until the target number of control pulses corresponding to the water intake requirement is met. By counting the pulses per unit time, the control accuracy is improved, thereby reducing the control error of the flow meter.

[0022] In one embodiment of the present application, the process of obtaining the number of control pulses of the flowmeter per unit time includes: obtaining the number of control pulses obtained in each counting cycle; wherein, each counting cycle includes: counting the control pulses of the flowmeter, and performing a counting interruption when the obtained number of control pulses reaches a preset threshold; taking the sum of the numbers of control pulses obtained in all counting cycles as the number of control pulses of the flowmeter per unit time.

[0023] In the above embodiment, further perform cyclic counting on the number of control pulses per unit time through a smaller pulse counting unit, thereby improving the controllability of pulse counting and the control accuracy of pulse counting.

[0024] In one embodiment of the present application, the controller is further configured to perform the following steps: determine the washing process corresponding to the clothing according to the mapping relationship between the material of the preset clothing and the washing process; perform the washing of the clothing according to the washing process.

[0025] In the above embodiment, based on the material recognition result of the clothing, select different washing processes according to the materials of different clothes, thereby improving the usability of the washing machine.

[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0028] Figure 1 is a schematic internal structure diagram of a washing machine shown in an exemplary embodiment of the present application;

[0029] Figure 2 is a flowchart of a controller control method shown in an exemplary embodiment of the present application;

[0030] Figure 3 is a schematic internal structure diagram of a washing machine shown in another exemplary embodiment of the present application;

[0031] Figure 4 is a flowchart of a preset water volume obtaining process shown in an exemplary embodiment of the present application;

[0032] Figure 5It is a schematic diagram of a test data table of different water inlet methods under different water pressures shown in an exemplary embodiment of the present application;

[0033] Figure 6 It is a flowchart of the pre-washing time determination process shown in an exemplary embodiment of the present application;

[0034] Figure 7 It is a flowchart of the process of determining the washing process shown in an exemplary embodiment of the present application;

[0035] Figure 8 It is a schematic diagram of the internal structure of a washing machine shown in another exemplary embodiment of the present application;

[0036] Figure 9 It is a flowchart of the flowmeter control process shown in an exemplary embodiment of the present application;

[0037] Figure 10 It is a flowchart of the control pulse counting process shown in an exemplary embodiment of the present application;

[0038] Figure 11 It is a flowchart of the control pulse counting process per unit time shown in an exemplary embodiment of the present application;

[0039] Figure 12 It is a flowchart of the control pulse counting process per unit time shown in another exemplary embodiment of the present application. Detailed implementation manners

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art.

[0041] In addition, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the present application.

[0042] The block diagrams shown in the drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0043] The flowcharts shown in the drawings are only illustrative and do not necessarily include all the content and operations / steps, nor do they have to be executed in the described order. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may change according to the actual situation.

[0044] It should be noted that: "a plurality of" mentioned in this article refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0045] The technical solution of the embodiment of this application proposes a washing machine, specifically referring to Figure 1 shown. The washing machine includes a cabinet 101, a washing tub 102 and a water level sensor 103 disposed inside the cabinet 101. Among them, the cabinet 101 is provided with a water inlet for water inlet, and a main washing valve 104 and a flow meter 105 are provided at the water inlet, and a controller 106 is disposed on the cabinet 101. The controller 106 is electrically connected to the main washing valve 104, the flow meter 105 and the water level sensor 103 respectively, and is used to receive the control instructions of the washing machine control panel and execute control on the main washing valve 104, the flow meter 105 and the water level sensor 103 according to the control instructions.

[0046] It should be noted that the structure shown in the figure is a schematic structural diagram of the corresponding embodiment, which does not represent all the structures of the washing machine and does not limit the structures outside the embodiment. At the same time, the structure of the washing tub 102 can be vertical, horizontal, or other forms, and the water inlet direction of the water inlet does not face the clothing placement area inside the washing tub 102.

[0047] Referring to Figure 2 shown, when the washing machine is in use, after the washing machine is turned on by the start instruction input through the control panel, the controller 106 executes control on the associated devices, and its control method includes at least step S210 to step S230. The detailed method is as follows:

[0048] In step S210, the main wash valve 104 is controlled to open, and it is detected whether the water level information on the side of the washing tub 102 close to the bottom of the cabinet 101 reaches a preset protection water level 107. If so, the flow meter 105 is enabled, and the main wash valve 104 is controlled to close when the water intake reaches the preset water volume.

[0049] Specifically, when the washing machine needs to intake water, the controller 106 controls the main wash valve 104 to continuously intake water, and detects through the water level sensor 103 whether the water level information on the side of the washing tub 102 close to the bottom of the cabinet 101 reaches the preset protection water level 107.

[0050] For the specific position of the protection water level 107, it is set according to the positions of the relevant structures in the cabinet 101 that require water cooling or water protection. If such structures are enabled without water intake, there will be certain safety hazards. For example, for a heating structure, if it is enabled when there is no water in the cabinet 101, it is likely to burn out the internal structure of the washing machine. Among them, such structures are often set at the bottom of the washing machine. For example, they are set in the gap between the bottom of the washing tub 102 and the cabinet 101. On the one hand, it can reduce the probability of direct contact between such structures and the clothes in the washing tub 102. On the other hand, it is convenient to quickly contact with water during the water intake process. In this application, the setting condition for the water level information corresponding to the protection water level 107 is that at least this type of structure needs to be submerged, so that during the use of the washing machine, the water intake volume of this type of structure can be satisfied first.

[0051] Furthermore, when the water level reaches the protection water level 107, the controller 106 controls the flow meter 105 to be enabled, and controls the main wash valve 104 to close when the water intake reaches the preset water volume.

[0052] Refer to Figure 3 As shown, the washing machine of this application is also provided with a weighing sensor 108 for obtaining the weight of the clothes; based on the weighing sensor 108, the weight of the clothes in the washing tub 102 can be calculated, and the preset water volume can be determined according to the clothes. Refer to Figure 4 As shown, it at least includes step S310 to step S330, and the detailed method is as follows:

[0053] In step S310, obtain the weight of the clothes; directly obtain the weight corresponding to the clothes through the measured value of the weighing sensor 108.

[0054] In step S330, according to the preset mapping relationship between the weight of the clothes and the water volume, determine the preset water volume corresponding to the weight of the clothes.

[0055] Illustratively, the mapping relationship between the weight of the clothes and the amount of water can be to preset a weight threshold for the weight of the clothes in the washing tub 102, determine whether the weight of the clothes is greater than the weight threshold. If so, set a corresponding amount of water. If not, set another corresponding amount of water. For example, the weight threshold is 3 kg. When the clothes are greater than 3 kg, it indicates a large load, and the corresponding water inlet amount is 30 L. When the weight threshold is 3 kg and the clothes are less than or equal to 3 kg, it indicates a small load, and the corresponding water inlet amount is 20 L. In addition, the mapping relationship between the weight of the clothes and the amount of water can also be a preset mapping table. For example, for 0 kg - 2 kg, set a corresponding water inlet amount, for 2 kg - 4 kg, set a corresponding water inlet amount, and so on.

[0056] It should be noted that the flow meter 105 controls the water inlet by calculating the number of pulses of the flow rate per unit time. At the same time, for the same type of water inlet method, when controlling the water inlet through the flow meter 105, the number of pulses corresponding to the flow rate is relatively stable. Specifically, reference can be made to Figure 5 Table 1 in it for illustrative description. As Figure 4 can be seen from the experimental data shown in it, when the water inlet method is the same, regardless of the values of the water pressure and the amount of water, the number of pulses per unit volume always remains in a relatively stable state. Therefore, through the corresponding relationship between the number of pulses and the amount of water, the flow meter 105 can accurately control the amount of water inlet.

[0057] In step S230, pre-wash the clothes. After the pre-wash is completed, obtain the remaining water level information in the washing tub 102, and identify the material of the clothes according to the remaining water level information.

[0058] Specifically, after determining the preset amount of water, pre-wash the clothes. Among them, for the determination of the pre-wash time, according to the mapping relationship between the preset amount of water and the pre-wash time, determine the pre-wash time corresponding to the preset amount of water, and then pre-wash the clothes according to the corresponding pre-wash time. During the pre-wash process, stir the clothes through the stirring structure in the washing machine to make the clothes fully absorb water, so that the remaining water level information can better reflect the water absorption effect of the clothes. Since the water absorption effects of clothes of different materials are different, the material of the clothes can be judged according to the remaining water level information.

[0059] Taking the corresponding example of the above method for determining the amount of water inlet as an illustration, referring to Figure 6 as shown, when the weight of the clothes is a small load, the amount of water inlet is 20 L, and the corresponding pre-wash time is 10 min. When the weight of the clothes is a large load, the amount of water inlet is 30 L, and the corresponding pre-wash time is 15 min. It can be seen that the heavier the load corresponding to the clothes, the more water inlet is required, and the longer the pre-wash time is required. Of course, the specific preset time can be set according to the actual use scenario and is not specifically limited.

[0060] In combination with the clothing material recognition method of the present application, an exemplary description is given. On the one hand, when only the flow meter 105 is used, if there is a water outage, or the water inlet cannot supply water due to other reasons, or there is a water leakage in the washing machine, etc., the flow meter 105 cannot sense the water level information in the tub, which easily leads to the water level in the cabinet 101 not being able to submerge the heating structure and other structures that require water cooling, thus there are certain potential safety hazards in use; on the other hand, when only the water level sensor 103 is used, if there are differences in the materials of the clothes to be washed, the corresponding water absorption capacity will also change accordingly, and there are also differences in the water penetration ability. Therefore, whether before or after stirring the clothes, if the material of the clothes is directly judged based on the corresponding water level information, there will be a large error.

[0061] Based on the above example, in an embodiment of the present application, the water level at the bottom of the washing tub 102 near the bottom of the cabinet 101 is controlled by the water level sensor 103. When the water level reaches the preset protection water level 107, the flow meter 105 is enabled to control its water inflow. Since the water level sensor 103 does not touch the clothes when controlling the water inflow below the protection water level 107, it can avoid the water inflow error caused by the clothes absorbing water, and at the same time improve the safety of using the washing machine. Combining with the flow meter 105, the water inflow for judging the material of the clothes is controlled, and the water absorption of the clothes is judged through the remaining water level information. Based on the high accuracy of the flow meter 105 in controlling the water volume, the reliability of judging the material of the clothes is improved.

[0062] In some embodiments, after the judgment of the material of the clothes is completed, due to the different water absorption amounts caused by the materials of different clothes, some clothes will have insufficient remaining water level information in the cabinet 101 to complete the subsequent washing process of the clothes after the pre-washing is completed. Therefore, after the pre-washing of the clothes is completed, it at least further includes judging whether the remaining water level information reaches the preset washing water level;

[0063] If not, control the main wash valve 104 to open for water replenishment until the water level information reaches the washing water level;

[0064] If so, start the washing of the clothes.

[0065] It should be noted that since the water flow meter 105 controls the water volume through pulses, although the control of the water inlet volume by the water flow meter 105 relatively improves the accuracy, it will also result in a loss of part of the water inlet speed. Therefore, after the pre-washing is completed, if water replenishment is required to ensure a normal washing process, at this time, the determination of the fabric of the clothes has been completed, and the main washing valve 104 can be directly opened for continuous water inlet, and the water level sensor 103 is used to detect the water level information in real time until the corresponding water level information reaches the washing water level and then the main washing valve 104 is closed, thereby improving the washing efficiency.

[0066] Through the above implementation manner, with the combined use of the flow meter and the water level sensor 103, the accuracy of part of the water inlet volume is improved, and the washing efficiency of the overall washing process is also improved.

[0067] In some examples, after determining the fabric of the clothes and when the water level information can meet the washing water level, according to the mapping relationship between the preset fabric of the clothes and the washing process, the washing process corresponding to the clothes is determined, and the washing of the clothes is performed according to the washing process.

[0068] Refer to Figure 7 As shown, for example, when it is determined that the clothes have a high cotton content and good water absorption, since the clothes of this type of fabric are easy to dye, have poor wrinkle resistance, and are not easy to soak, during the washing process of this type of clothes, the clothes are not heated, and the rotation speeds of rinsing, dehydration, and final dehydration are set relatively low. At the same time, the rotation amplitude of the drum during main washing and rinsing is also relatively low to reduce the probability of clothes damage; when it is determined that the clothes have a high polyester content and poor water absorption, since the clothes of this type of fabric are durable and wrinkle-resistant and stiff, during the washing process of this type of clothes, heating can be performed, and the rotation speeds of rinsing, dehydration, and final dehydration are set relatively high. At the same time, the rotation amplitude of the drum during main washing and rinsing is also relatively high, and the number of rinsing times is increased to improve the cleaning effect of this type of clothes; when it is determined that the clothes are of a mixed fabric, the default washing process is adopted, and the washing rhythm is moderate. Of course, for the classification of clothes and the parameter settings of the corresponding washing process, there can be other types, not limited to the above three types, and the above three types are only representative setting example results.

[0069] In some embodiments, refer to Figure 8 As shown, a pre-washing valve 109 is also provided at the water inlet of the box body 101. Before controlling the opening of the main washing valve 104, it is judged whether it is the main washing stage;

[0070] If it is, the main washing valve 104 is opened, and after the water inlet volume reaches the protection water level 107, the main washing valve 104 is closed when the water inlet volume reaches the preset water volume according to the water flow meter 105;

[0071] If the answer is no, the main washing valve 104 and the pre-washing valve 109 are opened simultaneously, and the flow meter 105 is enabled to control the closing of the main washing valve 104 and the pre-washing valve 109 when the water inflow reaches the preset water volume.

[0072] Specifically, during the process that is not the main washing stage, in addition to controlling the opening of the main washing valve 104, it is also necessary to open the pre-washing valve 109 to meet additional water inlet requirements, such as the water inlet requirements for diluting softener, diluting rinse aid, etc. At the same time, the detection by the water level sensor 103 cannot control the water inflow in this regard. Therefore, the flow meter 105 is required to execute the control of the corresponding water inflow.

[0073] Further, if it is not the main washing stage, before simultaneously opening the main washing valve 104 and the pre-washing valve 109, it is determined whether it is the softening stage;

[0074] If the answer is yes, the main washing valve 104 and the pre-washing valve 109 are opened simultaneously, and the flow meter 105 is enabled. According to the preset softening water inflow and at preset time intervals, the flow meter 105 is controlled to perform intermittent water inlet, and the main washing valve 104 and the pre-washing valve 109 are closed when the water inflow reaches the softening water inflow;

[0075] If the answer is no, the main washing valve 104 and the pre-washing valve 109 are opened simultaneously, and the flow meter 105 is enabled to control the closing of the main washing valve 104 and the pre-washing valve 109 when the water inflow reaches the preset water volume.

[0076] Through the above embodiments, if it is the softening stage, a small amount of water inflow is required for softening the clothes, and intermittent water inlet is performed according to the softening water inflow to improve the softening effect. If it is not the softening stage, it is the rinsing stage. For the rinsing stage, a large amount of water inflow is required for rinsing the clothes, and continuous water inlet is performed according to the preset water volume to improve the rinsing efficiency.

[0077] In some embodiments, referring to Figure 9 As shown, the specific control process of the flow meter 105 in this application at least includes steps S410 to S430, and the detailed method is as follows:

[0078] In step S410, according to the mapping relationship between the preset control pulse number of the flow meter 105 and the water inflow, the target number of control pulses corresponding to the preset water volume is determined;

[0079] Specifically, referring to Figure 5The experimental data shown in Table 1 is described by way of example. Through experimental data testing, it is obtained that for a water inflow of 1 L, the number of control pulses is 460. Therefore, the water inflow can be controlled by the number of pulses. When the water inflow is 10 L, the corresponding total number of pulses is 4600. Thus, the target number of control pulses corresponding to the preset water volume can be calculated, and the flowmeter 105 can control the water inflow. Of course, it should be noted that in the above example, for a water inflow of 1 L and a control pulse number of 460, it is only an example for illustration and does not limit the specific values of this mapping relationship.

[0080] In step S430, during the process of enabling the flowmeter 105, when the number of control pulses of the flowmeter 105 reaches the target number, the main wash valve 104 and the pre-wash valve 109 are controlled to close.

[0081] Through the above implementation manner, based on the high control accuracy characteristic of the flowmeter 105, the water inflow is controlled, and when the water inflow meets the requirements, the corresponding main wash valve 104 and pre-wash valve 109 are controlled to close, thereby improving the control accuracy of the main wash valve 104 and the pre-wash valve 109.

[0082] Further, in step S430, referring to Figure 10 As shown, for the specific process in which the number of control pulses of the flowmeter 105 reaches the target number, it at least includes steps S510 to S530, and the detailed method is as follows:

[0083] In step S510, the number of control pulses of the flowmeter 105 within multiple unit times is successively obtained;

[0084] Specifically, taking the number of control pulses within a unit time as the counting unit, so that during the control process of the flowmeter 105, the counting of control pulses is more accurate.

[0085] In step S530, the number of control pulses corresponding to multiple unit times is accumulated until the total number of control pulses reaches the preset target number.

[0086] Through the above implementation manner, the control pulses within a unit time are counted, and the number of control pulses within multiple unit times is accumulated until the target number of control pulses corresponding to the water inflow demand is satisfied, thereby reducing the control error of the flowmeter 105.

[0087] Further, in step S510, referring to Figure 11 As shown, for the process of obtaining the number of control pulses of the flowmeter 105 within each unit time, it at least includes steps S610 to S630, and the detailed method is as follows:

[0088] In step S610, the number of control pulses obtained for each counting cycle is acquired; wherein, each counting cycle includes: counting the control pulses of the flowmeter 105, and performing a counting interruption when the number of obtained control pulses reaches a preset threshold value.

[0089] Referring to Figure 12 As shown, the threshold value for controlling the flowmeter 105 to perform an interruption is 10, and the unit time is 1 second. During the process of enabling the flowmeter 105, every time the control pulse count reaches 10 times, an interruption is performed, and it is determined whether the counting time meets 1 second. If it does not meet, the counting of 10 more control pulses is performed, and so on in a cycle.

[0090] In step S630, the sum of the numbers of control pulses obtained for all counting cycles is used as the number of control pulses of the flowmeter 105 within the unit time.

[0091] Based on the above example, during the counting process of the control pulses, all the control pulses within 1 second are accumulated to obtain the number of control pulses within the unit time. It should be noted that during the use of the flowmeter 105, due to the instability of the pulses, the total number of pulses within the same time period is not necessarily the same, and the number of pulses is also unstable for a relatively long time. However, in this application, by shortening the pulse counting time period, the counting error in different time periods is reduced, so as to improve the conversion accuracy between the pulse counting and the corresponding water volume. At the same time, since the accuracy of the clothing material identification depends on the water inlet accuracy, the accuracy of the clothing material identification is improved.

[0092] Through the above implementation manner, in a multi-level control manner, the counting of the control pulses is realized, and by means of the gradually decreasing control quantity of the control pulses, the controllable range of the pulse counting is narrowed, thereby improving the control accuracy of the pulse counting.

[0093] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application.

[0094] It should be understood that the present application is not limited to the exact structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A washing machine, characterized in that, it includes: a cabinet; a washing tub and a water level sensor disposed within the cabinet; the washing tub is connected to a water inlet, and the water inlet is provided with a main washing valve and a flow meter; a controller, electrically connected to the main washing valve, the flow meter, and the water level sensor respectively, and configured to perform the following steps: control to open the main washing valve, and detect whether the water level information on the side of the washing tub close to the bottom of the cabinet reaches a preset protection water level. If so, enable the flow meter and control to close the main washing valve when the water inflow reaches a preset water volume; perform pre-washing on the clothes, obtain the remaining water level information in the washing tub after the pre-washing ends, and identify the material of the clothes according to the remaining water level information.

2. The washing machine according to claim 1, characterized in that, the washing machine is further provided with a weighing sensor for obtaining the weight of the clothes; the controller is further configured to perform the following steps: obtain the weight of the clothes; determine a preset water volume corresponding to the weight of the clothes according to a preset mapping relationship between the weight of the clothes and the water volume.

3. The washing machine according to claim 2, characterized in that, the controller is further configured to perform the following steps: determine a pre-washing time corresponding to the preset water volume according to a preset mapping relationship between the water inflow and the pre-washing time; perform pre-washing on the clothes according to the pre-washing time.

4. The washing machine according to claim 1, characterized in that, the controller is further configured to perform the following steps: judge whether the remaining water level information reaches a preset washing water level; if not, control to open the main washing valve for water replenishment until the water level information reaches the washing water level; if so, start washing the clothes.

5. The washing machine according to any one of claims 1-4, characterized in that, the water inlet is further provided with a pre-washing valve; the controller is further configured to perform the following steps: before controlling to open the main washing valve, judge whether it is the main washing stage; if so, open the main washing valve, and after the water inflow reaches the protection water level, control to close the main washing valve when the water inflow reaches a preset water volume according to the flow meter; if not, open the main washing valve and the pre-washing valve simultaneously, and enable the flow meter to control to close the main washing valve and the pre-washing valve when the water inflow reaches the preset water volume.

6. The washing machine according to claim 5, characterized in that, the controller is further configured to perform the following steps: before opening the main washing valve and the pre-washing valve simultaneously, judge whether it is the softening stage; if so, open the main washing valve and the pre-washing valve simultaneously, and enable the flow meter. According to a preset softening water inflow and at a preset time interval, control the flow meter to perform intermittent water inflow, and close the main washing valve and the pre-washing valve when the water inflow reaches the softening water inflow; if not, open the main washing valve and the pre-washing valve simultaneously, and enable the flow meter to control to close the main washing valve and the pre-washing valve when the water inflow reaches the preset water volume.

7. The washing machine according to claim 5, characterized in that, The controller is further configured to perform the following steps: Determine the target number of control pulses corresponding to the preset water volume according to the mapping relationship between the preset number of control pulses of the flow meter and the water inflow volume; During the process of enabling the flow meter, when the number of control pulses of the flow meter reaches the target number, control to close the main washing valve and the pre-washing valve.

8. The washing machine according to claim 7, wherein, The controller is further configured to perform the following steps: Successively obtain the number of control pulses of the flow meter within multiple unit times; Accumulate the number of control pulses corresponding to multiple unit times until the total number of control pulses reaches a preset target number.

9. The washing machine according to claim 8, wherein, The process of obtaining the number of control pulses of the flow meter within each unit time includes: Obtain the number of control pulses obtained for each counting cycle; wherein, each counting cycle includes: counting the control pulses of the flow meter, and performing a counting interruption when the obtained number of control pulses reaches a preset threshold; taking the sum of the number of control pulses obtained from all counting cycles as the number of control pulses of the flow meter within the unit time.

10. The washing machine according to claim 5, wherein, The controller is further configured to perform the following steps: Determine the washing process corresponding to the clothes according to the mapping relationship between the material of the preset clothes and the washing process; Perform the washing of the clothes according to the washing process.

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