Spraying control method of washing equipment and washing equipment

Abstract

The invention discloses a spraying control method of washing equipment and the washing equipment, the spraying control method comprises a spraying program used for spraying clothes, in the spraying process, whether the water absorption saturation degree of the clothes reaches the upper limit or not is judged, and if yes, the spraying program is controlled to be closed. Water sprayed into the barrel body can play a role in rinsing the clothes only when permeating into the clothes, the more water permeating into the clothes is, the better rinsing effect on the clothes is, the water absorption capacity of the clothes is limited, and when the absorbed water amount reaches the water absorption saturation upper limit of the clothes, the clothes stop absorbing water. According to the washing machine, the spraying program is controlled to be closed after the clothes reach the upper limit of the water absorption saturation, so that the clothes can absorb enough water to obtain the optimal rinsing effect, and the clothes can be washed and washed at the same time. And water waste caused by the fact that excessive water cannot be absorbed by the clothes due to water saturation of the clothes and directly flows away from the washing equipment can be avoided.

Description

Technical Field

[0001] The invention belongs to the field of household appliances, and in particular, relates to a spray control method of a washing device and the washing device. Background Art

[0002] Washing equipment refers to equipment used for washing clothes, such as washing machines, including pulsator washing machines and drum washing machines.

[0003] The general process of washing clothes in a washing machine is: main wash-rinse-spin. During the main wash stage, a large amount of detergent is absorbed by the clothes. After the main wash stage, there is still a lot of detergent and sewage left in the clothes. It is necessary to rinse out this part of detergent and sewage in the rinsing stage to obtain clean clothes.

[0004] However, the traditional water storage rinsing method requires repeated water storage and consumes a lot of water. Now some washing equipment uses spray rinsing, that is, only part of the water is sprayed on the clothes after the main wash, and the water sprayed on the clothes is dehydrated after it penetrates into the clothes. The detergent and sewage in the clothes are removed together with the spray water, which can greatly reduce the water consumption for rinsing.

[0005] Different clothes have different water absorption. Clothes with strong water absorption have more residual detergent and sewage, and need more spray water to complete rinsing. In current washing equipment, fixed spray time and spray times are used, or the spray time is extended or shortened according to the weight of the clothes. The weight of clothes cannot fully reflect the demand for spray water. For clothes with strong water absorption, there may be insufficient spray water, and for clothes with weak water absorption, there may be too much spray water.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The invention provides a spray control method for washing equipment and washing equipment, the purpose of which is to achieve accurate control of the spray amount of spray water.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A spray control method for a washing device includes a spray program for spraying clothes. During the spraying process, it is determined whether the water absorption saturation of the clothes reaches an upper limit. If so, the spray program is controlled to be closed.

[0010] Furthermore, the washing device includes a motor that provides power for the rotation of the impeller and the barrel. During the spraying process, the impeller and / or the barrel are controlled to rotate. The preset current threshold I a , the step of judging whether the water absorption saturation of the clothing has reached an upper limit comprises:

[0011] Control to obtain the motor current value I n , compare the obtained current value I n With the preset current threshold I a If the current value I obtained within the set time is n Both are at the current threshold I a If the water saturation of the clothes is within the range of , it is determined that the water absorption saturation of the clothes has reached the upper limit.

[0012] Furthermore, the washing device includes a motor that provides power for the rotation of the impeller and the barrel. During the spraying process, the impeller and / or the barrel are controlled to rotate. The preset current threshold I a and number of times N0, the determination of whether the water absorption saturation of the clothing has reached the upper limit comprises:

[0013] Control to obtain the motor current value I n , compare the obtained current value I n With the preset current threshold I a The size of the current threshold I is controlled to obtain the continuous a Current value within the range I n The number of times N, if N ≥ N0, it is determined that the water absorption saturation of the clothes has reached the upper limit, where N0 ≥ 2.

[0014] Furthermore, the preset spraying time T MAX , control to obtain the spraying time T of the washing equipment, compare the obtained spraying time T with the preset time T MAX The size of MAX , then the control shuts down the spray program.

[0015] Further, after the spraying program is turned off, the washing equipment is controlled to dehydrate;

[0016] Preferably, the water absorption saturation of the clothes is controlled and the dehydration speed is controlled to be in a positive correlation with the water absorption saturation of the clothes.

[0017] Furthermore, the water absorption of the clothes is controlled to determine whether the water absorption of the clothes is strong or weak. If the water absorption of the clothes is strong, the washing device is controlled to spray again after the dehydration is completed.

[0018] Further, the determining of the water absorption of the clothing includes:

[0019] The water level difference △H is preset. In the main wash stage, the control obtains the water level change difference △H' in the barrel within the set time, and compares the size of △H' with △H. If △H'≥△H, it is judged that the clothes have strong water absorption;

[0020] Alternatively, a current difference △I is preset, and when the spray program is turned on, the control obtains the change value △I' of the motor current within the set time, and compares the size of △I' with △I. If the current change value △I'≥△I, it is judged that the clothing has strong water absorption.

[0021] Furthermore, the load in the barrel is controlled and acquired, and the number of spraying times is controlled to be positively correlated with the load in the barrel.

[0022] Furthermore, after the washing device is dehydrated, the barrel and the pulsator are controlled to stop rotating, the position of the clothes in the barrel is obtained, and the spraying program is controlled to start spraying water on the clothes;

[0023] Alternatively, the barrel body and / or the impeller are controlled to rotate, and a spraying program is controlled to start spraying water toward the inner wall around the barrel body.

[0024] A washing device is controlled by any of the spray control methods described above.

[0025] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0026] 1. Rinse the clothes by spraying. The more water the clothes absorb, the better the rinsing effect. When the clothes in the barrel reach the upper limit of water absorption saturation, the clothes will no longer absorb water. If the spraying continues, the water will flow out directly from the barrel. After the clothes reach the upper limit of water absorption saturation, the spraying program is controlled to be turned off, which can not only achieve the best rinsing effect for the clothes, but also avoid the waste of water flowing out directly.

[0027] 2. As the clothes absorb water, their weight increases, and the load on the motor that powers the impeller and the barrel gradually increases. When the clothes absorb water to the upper limit of the saturation, the weight of the clothes no longer changes. Therefore, it can be considered that when the current flowing through the motor no longer changes, the clothes have reached the upper limit of the saturation. The water saturation of the clothes is detected by current, and the feedback is accurate and rapid.

[0028] 3. After obtaining the position of the clothes in the barrel, spray water directly on the clothes, so that all the water can be absorbed by the clothes, avoiding the water being sprayed on the barrel and flowing away directly, which not only reduces water waste but also improves spraying efficiency.

[0029] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0031] Figure 1 A method for controlling spraying of washing equipment according to the present invention;

[0032] Figure 2 It is another washing equipment spray control method of the present invention;

[0033] Figure 3 It is another washing equipment spray control method of the present invention;

[0034] Figure 4 It is another washing equipment spray control method of the present invention;

[0035] Figure 5 It is another washing equipment spray control method of the present invention;

[0036] Figure 6 It is another washing equipment spray control method of the present invention;

[0037] Figure 7 It is another washing equipment spray control method of the present invention;

[0038] Figure 8 It is another washing equipment spray control method of the present invention;

[0039] Fig. 9 This is another spray control method for washing equipment of the present invention.

[0040] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0042] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present invention proposes a Figures 1 to 9 The spray control method of the washing device and the washing device shown. The washing device refers to a device used for washing clothes, mainly refers to a washing machine, including a pulsator washing machine and a drum washing machine.

[0045] The washing device includes a barrel for accommodating clothes and a pulsator at the bottom of the barrel. If the washing device is a drum washing machine, the pulsator may not be present. The washing device also includes a motor for providing power for the pulsator and the barrel to rotate. If it is a drum washing machine, the barrel rotates during dehydration and spray rinsing; if it is a pulsator washing machine, the barrel and the pulsator may rotate synchronously or the pulsator may rotate alone during dehydration and spray rinsing.

[0046] When washing clothes, the main process of the washing machine includes: main wash - rinse - dehydration. Specifically, between the main wash and rinse, it also includes drainage and dehydration after the main wash.

[0047] The main wash refers to the process of adding water to the washing machine, and then stirring the clothes with water through the rotation of the impeller or the rotation of the impeller and the barrel to clean the dirt on the clothes.

[0048] The washing device also includes a spraying program, which refers to spraying water into the barrel through a spray head arranged on the washing device to soak the clothes.

[0049] The present invention proposes a spray control method for washing equipment, in order to accurately control the amount of water sprayed, such as Figure 1 As shown, take the following approach:

[0050] S1: Start;

[0051] S2: After the main wash is finished, the control starts the spray program;

[0052] S3: Control and obtain the water absorption saturation of the clothes;

[0053] S4: Determine whether the water absorption saturation of the clothes has reached the upper limit, if so, execute S5, otherwise execute S3;

[0054] S5: Control to close the spraying program;

[0055] S6: End.

[0056] During the entire spraying process, the drainage system of the washing equipment is always open and can drain water to the outside of the washing equipment.

[0057] The water absorption saturation of the clothes in steps S3 and S4 refers to the degree of water absorption of the clothes after being sprayed. When the clothes are continuously sprayed but cannot be sprayed with water, it is considered that the clothes have reached the upper limit of water absorption saturation.

[0058] If too little water is sprayed during the shower, it will result in incomplete rinsing. In order to achieve a better rinsing effect, the number of sprays should be increased and the rinse should be repeated to extend the rinsing time. If too much water is sprayed, it will cause a waste of water.

[0059] When the clothes reach the upper limit of their water absorption saturation, they can no longer absorb water. Even if they are sprayed again, the newly sprayed water will flow away directly and cannot be absorbed by the clothes, and thus cannot dissolve and carry away the detergent and sewage in the clothes. That is, the amount of water absorbed by the clothes at this time is the maximum amount of water that can be used for rinsing when rinsing by spraying. Rinsing with this amount of water can maximize the rinsing effect while not wasting water.

[0060] In the present invention, by controlling the opening and closing of the spraying program through the water absorption saturation of the clothes, the water spraying amount can be controlled most accurately to avoid insufficient or excessive water spraying due to differences in the weight and water absorption of the clothes, thereby ensuring the rinsing effect and saving water.

[0061] As an embodiment of the present invention, in order to obtain and judge the water absorption saturation of clothes, Figure 2 As shown, the following method is used:

[0062] S1: Start;

[0063] S2: preset current threshold I a ;

[0064] S3: After the main wash is finished, the impeller and / or the barrel are controlled to rotate, and the spraying program is controlled to start;

[0065] S4: Control and obtain the current values ​​I1, I2, ... I of the motor within the set time period n ;

[0066] S5: Compare the obtained I1, I2, ... I n With the preset current threshold I a If the obtained I1, I2, ... n Both are at the current threshold I a If the value is within the range of , execute S6, otherwise execute S4;

[0067] S6: Control to close the spraying program;

[0068] S7: End.

[0069] When water is sprayed into the drum, the clothes absorb water and gain weight, which increases the load on the motor that powers the impeller and the drum, and the current flowing through the motor increases accordingly. When the water absorption saturation of the clothes reaches the upper limit, the clothes no longer absorb water, and the water sprayed on the clothes flows away directly, and the load on the motor no longer increases, so the current flowing through the motor will basically stabilize within a range.

[0070] The preset current threshold I a It is the range threshold for motor current stability when the clothes reach the upper limit of water absorption saturation, which is obtained based on experiments, rather than a single value, and can be adjusted as needed.

[0071] Furthermore, the more clothes there are, the higher the current threshold I a The bigger.

[0072] Furthermore, the more clothes there are, the higher the current threshold I a The wider the scope.

[0073] The more clothes there are, the greater the vibration may be when the barrel rotates. When the barrel shakes, the instantaneous load change may be greater, so when it reaches the upper limit of water absorption saturation, the fluctuation range of the motor current will be greater.

[0074] In step S3, controlling the rotation of the impeller and / or the barrel body means that the impeller can be controlled to rotate alone, the impeller and the barrel body can be controlled to rotate together, or the barrel body can be controlled to rotate alone.

[0075] The set time period in step S4 may be 10 seconds.

[0076] In this embodiment, the water absorption saturation of the clothes is monitored by monitoring the motor current. When the motor current is stable at a preset current threshold value I a When it is within the range, it means that the water saturation of the clothing has reached the upper limit.

[0077] As another embodiment of the present invention, in order to obtain and determine the water absorption saturation of clothing, Figure 3 As shown, the following method is used:

[0078] S1: Start;

[0079] S2: preset current threshold I a and number of times N0;

[0080] S3: After the main wash is finished, the impeller and / or the barrel are controlled to rotate, and the spraying program is controlled to start;

[0081] S4: Control and obtain the current values ​​I1, I2, ... I of the set number of motors n ;

[0082] S5: Compare the obtained I1, I2, ... I n With the preset current threshold I a The size of the current threshold I is controlled to obtain the continuous a Current value within the range I n The number of times N;

[0083] S6: Compare the obtained number of times N with the preset number of times N0. If N≥N0, execute S7, otherwise execute S4;

[0084] S7: Control to close the spraying program;

[0085] S8: End.

[0086] In this embodiment, when the current threshold I is continuously obtained a When the number of current values ​​within the range reaches a preset number N0, it can be considered that the current of the motor has stabilized, and further that the water absorption saturation of the clothes has reached the upper limit.

[0087] As another embodiment of the present invention, in order to obtain and determine the water absorption saturation of clothing, the following method is used:

[0088] S1: Start;

[0089] S2: preset current fluctuation value I0;

[0090] S3: After the main wash is finished, the impeller and / or the barrel are controlled to rotate, and the spraying program is controlled to start;

[0091] S4: Control and obtain the current values ​​I1, I2, ... I of the motor within the set time period n ;

[0092] S5: Calculate the current fluctuation value △I1=|I2-I1|, △I2=|I3-I2|……△I n-1 =|I n -I n-1 ∣;

[0093] S6: Compare △I1, △I2, ... △I n-1With the preset current fluctuation value I0, if △I1, △I2...△I n-1 If both are less than or equal to I0, execute S7, otherwise execute S4;

[0094] S7: Control to close the spraying program;

[0095] S8: End.

[0096] Under ideal conditions, the preset current fluctuation value I0=0. However, in actual use, the barrel may shake, the flow rate of water sprayed into the barrel may fluctuate, and there may be other factors that may affect the stability of the motor load, causing the motor current to still change slightly after the clothes reach the upper limit of water absorption saturation. At this time, the preset current fluctuation value I0 needs to be set to a variable range according to the actual situation.

[0097] Furthermore, the preset current fluctuation value I0 can be selected according to the clothes in the barrel. For example, the more clothes there are in the barrel, the larger the preset current fluctuation value I0 is.

[0098] Controlling the rotation of the impeller and / or the barrel body in step S3 refers to the motor providing power for the impeller and the barrel body to rotate.

[0099] Preferably, the motor and the barrel are controlled to rotate at a uniform speed.

[0100] The set time period in step S4 refers to a fixed time length, such as 5-10 seconds. During this fixed time length, the current fluctuation value I n If all are less than or equal to the preset current fluctuation value I0, it means that the weight of the clothes in the barrel has stabilized and no longer absorbs water, and the upper limit of water absorption saturation has been reached.

[0101] If the washing device is a drum washing machine, controlling the rotation of the impeller and / or the barrel refers to controlling the rotation of the barrel. If the washing device is a pulsator washing machine, controlling the rotation of the impeller and / or the barrel generally refers to controlling the impeller and the barrel to rotate synchronously in the same direction, or it may be controlling one of the impeller and the barrel to rotate separately.

[0102] When water is sprayed into the drum, the clothes absorb water and increase their weight, which increases the load on the motor that powers the impeller and the drum, and the current flowing through the motor increases accordingly. When the water absorption saturation of the clothes reaches the upper limit, the clothes no longer absorb water, and the water sprayed on the clothes flows away directly, and the load on the motor no longer increases, so the current flowing through the motor basically does not change.

[0103] In this embodiment, the change in the weight of the clothes in the barrel is determined by the change in the current in the motor that provides power to the impeller and the barrel, and then it is determined whether the water absorption saturation of the clothes has reached an upper limit. When the current fluctuation value within the set time is less than the preset current fluctuation value, it is determined that the weight of the clothes in the barrel has stopped changing, and then it is determined that the clothes have reached the upper limit of water absorption saturation.

[0104] As another embodiment of the present invention, in order to determine whether the clothes have reached the upper limit of water absorption saturation, the following method can also be used:

[0105] S1: Start;

[0106] S2: preset current fluctuation value I0;

[0107] S3: After the main wash is finished, the impeller and / or the barrel are controlled to rotate, and the spraying program is controlled to start;

[0108] S4: Control and obtain the current values ​​I1, I2, ... I of the set number of motors n ;

[0109] S5: Calculate the current fluctuation value △I1=|I2-I1|, △I2=|I3-I2|……△I n-1 =|I n -I n-1 ∣;

[0110] S6: Compare △I1, △I2, ... △I n-1 With the preset current fluctuation value I0, if △I1, △I2...△I n-1 If both are less than or equal to I0, execute S7, otherwise execute S4;

[0111] S7: Control to close the spraying program;

[0112] S8: End.

[0113] Among them, n≥3.

[0114] This embodiment can also be expressed as:

[0115] S1: Start;

[0116] S2: preset current fluctuation value I0 and number N0;

[0117] S3: After the main wash is finished, the impeller and / or the barrel are controlled to rotate, and the spraying program is controlled to start;

[0118] S4: Control and obtain the current values ​​I1, I2, ... I of the set number of motors n ;

[0119] S5: Calculate the current fluctuation value △I1=|I2-I1|, △I2=|I3-I2|……△I n-1 =|I n -I n-1 ∣;

[0120] S6: Compare △I1, △I2, ... △I n-1 The magnitude of the preset current fluctuation value I0;

[0121] S7: Obtain the current fluctuation value △I that occurs continuously n The number of times N that the current is less than or equal to the preset current value I0;

[0122] S8: Compare the obtained number of times N with the preset number of times N0. If N≥N0, execute S9, otherwise execute S4;

[0123] S9: Control to close the spraying program;

[0124] S10: End.

[0125] Among them, N≥2.

[0126] In this embodiment, the control obtains a set number of current values ​​and calculates the fluctuation of these current values. If the fluctuation value is less than the preset fluctuation value I0, it can be determined that the clothes in the barrel have indeed reached the upper limit of water absorption saturation.

[0127] As an embodiment of the present invention, when the washing device is washing, the water pressure of the water source supplying water to the washing device, such as a tap water pipe, may be relatively low, resulting in slow water inflow. In this case, Figure 4 As shown, the following methods can be adopted:

[0128] S1: Start;

[0129] S2: Preset spraying time T MAX ;

[0130] S3: After the main wash is finished, the control starts the spray program and starts timing;

[0131] S4: Get the spraying time T;

[0132] S5: Compare the obtained spraying time T with the pre-trial spraying time T MAX The size of MAX , then execute S6, otherwise execute S8;

[0133] S6: controlling and obtaining the water absorption saturation of the clothes;

[0134] S7: Determine whether the water absorption saturation of the clothes has reached the upper limit, if so, execute S8, otherwise execute S4;

[0135] S8: Control to close the spraying program;

[0136] S9: End.

[0137] When the water pressure at the water source is insufficient, the water intake during spraying will be very slow, and the clothes will not be able to reach the upper limit of water absorption saturation, which will extend the spraying process indefinitely and affect the washing efficiency.

[0138] Furthermore, if it is detected that the water pressure is too low or the water supply is cut off, the spraying is stopped and the user is prompted through the washing device. A prompt message can also be sent to the user's mobile phone or other networked devices through the Internet of Things to inform the user that the water supply is cut off or the water pressure is too low.

[0139] In this embodiment, the maximum spraying time T is set MAX If the spraying time T reaches the preset spraying time T MAX , then directly turn off the spraying program, stop spraying, and proceed to the next step. Avoid long-term inefficient spraying that affects the washing process.

[0140] As another embodiment of the present invention, after the spraying process, the clothes have been immersed in water, and the detergent in the clothes has dissolved into this part of the water. This part of the detergent needs to be rinsed out, such as Figure 5 As shown, take the following approach:

[0141] S1: Start;

[0142] S2: Preset spraying time T MAX ;

[0143] S3: After the main wash is finished, the control starts the spray program and starts timing;

[0144] S4: Get the spraying time T;

[0145] S5: Compare the obtained spraying time T with the pre-trial spraying time T MAX The size of MAX , then execute S6, otherwise execute S8;

[0146] S6: controlling and obtaining the water absorption saturation of the clothes;

[0147] S7: Determine whether the water absorption saturation of the clothes has reached the upper limit, if so, execute S8, otherwise execute S4;

[0148] S8: Control to close the spraying program;

[0149] S9: Control the dehydration of washing equipment;

[0150] S10: End.

[0151] In this embodiment, after the washing device completes the spraying, the washing device is controlled to perform dehydration, so that the detergent in the clothes can be removed and flow away together with the spraying water, thereby completing the rinsing of the clothes.

[0152] As an implementation method of this embodiment, the water absorption saturation of the clothes is controlled and obtained, and the dehydration speed is controlled to be positively correlated with the water absorption saturation of the clothes.

[0153] In this embodiment, for clothes with high water absorption saturation, a higher dehydration speed is adopted, which can complete the dehydration faster and make the clothes cleaner; for clothes with low water absorption saturation, a lower dehydration speed is adopted, which can reduce the load of the motor and save electricity.

[0154] Furthermore, the water absorption saturation of the clothes can be calculated by the current value flowing through the motor, specifically: the current of the motor when the impeller and the barrel rotate at a constant speed is controlled. The faster the current value changes, the faster the load changes, that is, the faster the weight of the clothes in the barrel changes, and the lower the water absorption saturation of the clothes when they absorb water, and the faster the water absorption speed. Correspondingly, the faster the current value changes, the lower the water absorption saturation of the clothes.

[0155] As an embodiment of the present invention, for clothes with strong water absorption, there is a lot of detergent remaining inside, and one spray rinse cannot rinse it out. Figure 6 As shown, take the following approach:

[0156] S1: Start;

[0157] S2: Preset spraying time T MAX ;

[0158] S3: After the main wash is finished, the control starts the spray program and starts timing;

[0159] S4: Get the spraying time T;

[0160] S5: Compare the obtained spraying time T with the pre-trial spraying time T MAX The size of MAX , then execute S6, otherwise execute S8;

[0161] S6: controlling and obtaining the water absorption saturation of the clothes;

[0162] S7: Determine whether the water absorption saturation of the clothes has reached the upper limit, if so, execute S8, otherwise execute S4;

[0163] S8: Control to close the spraying program;

[0164] S9: Control the dehydration of washing equipment;

[0165] S10: controlling the water absorption of the clothes;

[0166] S11: judging the water absorption of the clothes, if the water absorption of the clothes is strong, executing S12, otherwise executing S13;

[0167] S12: Control the second start of the spraying program and dehydration;

[0168] S13: End.

[0169] For clothes with strong water absorption, you can add one spray, or you can control the number of sprays to be positively correlated with the water absorption of the clothes according to the strength of their water absorption, and then set multiple sprays for clothes with higher water absorption.

[0170] In this embodiment, spraying the highly absorbent clothes twice or even multiple times can effectively rinse out a large amount of detergent remaining in the highly absorbent clothes, thereby avoiding incomplete rinsing of the clothes.

[0171] As an implementation method of this embodiment, Figure 7 As shown, the following method is used to judge the water absorption of clothing:

[0172] S1: Start;

[0173] S2: Preset spraying time T MAX , water level difference △H;

[0174] S3: The main wash starts, and the water level change difference △H' in the barrel is obtained within the set time;

[0175] S4: After the main wash is finished, the control starts the spray program and starts timing;

[0176] S5: Get the spraying time T;

[0177] S6: Compare the obtained spraying time T with the pre-trial spraying time T MAX The size of MAX , then execute S7, otherwise execute S9;

[0178] S7: controlling and obtaining the water absorption saturation of the clothes;

[0179] S8: Determine whether the water absorption saturation of the clothes has reached the upper limit, if so, execute S9, otherwise execute S5;

[0180] S9: Control to close the spraying program;

[0181] S10: Control the dehydration of the washing equipment;

[0182] S11: comparing the obtained water level change difference △H' with the preset water level difference △H, if △H'≥△H, it is determined that the clothes have strong water absorption, and S12 is executed; otherwise, it is determined that the clothes have weak water absorption, and S13 is executed;

[0183] S12: Control the second start of the spraying program and dehydration;

[0184] S13: End.

[0185] The set time described in step S3 refers to a fixed washing time, such as 120 seconds, which needs to start after the water intake is completed in the main wash stage and end before the drainage of the main wash stage begins.

[0186] In this embodiment, the water level change difference ΔH′ within a set time can represent the water level change speed, that is, the water absorption speed of the clothes. The faster the water absorption speed, the better the water absorption of the clothes.

[0187] As another implementation of this embodiment, in order to judge the water absorption of clothes, Figure 8 As shown, you can also use the following method:

[0188] S1: Start;

[0189] S2: Preset spraying time T MAX , current difference △I;

[0190] S3: After the main wash is finished, the impeller and / or the barrel are controlled to rotate and the spraying program is started, and the timing is started;

[0191] S4: Control and obtain the change value △I' of the motor current within the set time;

[0192] S5: Get the spraying time T;

[0193] S6: Compare the obtained spraying time T with the pre-trial spraying time T MAX The size of MAX , then execute S7, otherwise execute S9;

[0194] S7: controlling and obtaining the water absorption saturation of the clothes;

[0195] S8: Determine whether the water absorption saturation of the clothes has reached the upper limit, if so, execute S9, otherwise execute S5;

[0196] S9: Control to close the spraying program;

[0197] S10: Control the dehydration of the washing equipment;

[0198] S11: compare the obtained current change value △I' with the preset current difference value △I, if △I'≥△I, execute S12, otherwise execute S13;

[0199] S12: Control the second start of the spraying program and dehydration;

[0200] S13: End.

[0201] When spraying, the weight of the clothes will continue to increase before reaching the upper limit of water absorption saturation, and the load on the motor that powers the impeller and the barrel will continue to increase, causing the current flowing through the motor to continue to increase. In other words, the stronger the water absorption of the clothes, the faster its weight changes, and the faster the current of the motor changes.

[0202] In this embodiment, the water absorption of the clothes is determined by the change of the motor current during spraying. The faster the current changes, the stronger the water absorption.

[0203] As another embodiment of the present invention, the more clothes there are in the barrel, the more residual detergent there is, and it is more difficult for the spray water to soak the clothes during spraying. The load in the barrel is controlled, and the number of spraying times is controlled to be positively correlated with the load in the barrel.

[0204] The load in the barrel can be represented in a variety of ways, for example, it can be the weight of the clothes in the barrel, or the weight of the clothes and washing water in the barrel. The water level of the washing water in the barrel can also be used to represent the load in the barrel.

[0205] In this embodiment, when there are a lot of clothes, multiple spraying is performed, so that the clothes can be rinsed more cleanly and the clothes can be prevented from being not rinsed clean due to uneven spraying or incomplete soaking caused by too many clothes.

[0206] As another embodiment of the present invention, there is a large space in the barrel body, and there are a number of through holes on the surrounding side walls of the barrel body for washing water to flow out. If the water sprayed into the barrel body cannot be sprayed directly onto the clothes, it may cause the washing water to leak directly from the through holes on the barrel body, causing waste. And it greatly prolongs the time required to complete the spraying, slowing down the rinsing efficiency. To solve this problem, two methods can be adopted:

[0207] Method 1: After the washing machine has been dehydrated, the impeller and the barrel are controlled to stop rotating, the position of the clothes in the barrel is controlled to be obtained, and the spray program is controlled to start spraying water on the clothes.

[0208] Furthermore, there are many ways to obtain the position of the clothes in the barrel, such as setting a camera specifically for obtaining images inside the barrel on the washing equipment, directly shooting the picture inside the barrel with the camera, and then analyzing the picture to obtain the position of the clothes in the barrel.

[0209] Furthermore, the camera can be installed at any position where the clothes in the barrel can be photographed.

[0210] Preferably, the camera can be installed on the inner side of the upper cover of the washing equipment. If the washing equipment has a barrel cover specially used for opening and closing the barrel body, it can also be installed on the inner side of the barrel cover, as long as the image inside the barrel body can be directly captured.

[0211] Furthermore, the camera shoots from top to bottom.

[0212] Furthermore, a water spraying nozzle is installed above the barrel body. The nozzle can be moved. After obtaining the position of the clothes, it moves to the top of the clothes to spray from top to bottom. The position of the nozzle itself remains unchanged, and the spraying direction of the rotating nozzle can be controlled to spray towards the position where the clothes are.

[0213] Furthermore, if the spraying direction of the rotating nozzle is controlled, the acquired position of the clothes includes not only the position of the clothes in the horizontal direction, but also the position of the clothes in the vertical direction, so that the direction of the nozzle can be accurately rotated to spray water onto the clothes.

[0214] In this method, a camera is used to determine the position of the clothes in the barrel, and then water is sprayed directly and accurately onto the clothes, which can maximize the absorption of the water sprayed into the barrel by the clothes. This not only prevents the water sprayed into the barrel from flowing away directly and saves water, but also allows the clothes to reach the upper limit of water absorption saturation in the shortest time, thereby speeding up washing.

[0215] Method 2: After the washing equipment is dehydrated, the impeller and the barrel are controlled to rotate, and the spraying program is controlled to start to spray water to the inner and outer side walls of the barrel.

[0216] Furthermore, the control of the rotation of the impeller and the barrel body may be the inertial rotation of the impeller and the barrel body after the dehydration is completed, or the impeller and the barrel body may be rotated under the power provided by the motor.

[0217] Furthermore, the water spraying nozzle can be directly arranged above the inner peripheral side wall of the barrel body, or slightly offset toward the central axis direction of the barrel body, so that the water spraying nozzle sprays from top to bottom during spraying.

[0218] In this method, the characteristic of clothes sticking to the barrel after dehydration is utilized, and water is sprayed directly from top to bottom on the inner wall of the barrel, and water can be sprayed on the clothes without precise positioning. At the same time, the barrel and the impeller are rotated during spraying, so that the clothes can be rotated, so that even if only one nozzle with a fixed position and fixed direction is set, the spraying of all clothes can be completed, and there is no need to set a camera, and the structure is simple.

[0219] As another embodiment of the present invention, the inertial rotation of the impeller and the barrel after the washing device is dehydrated can be used for spraying. Fig. 9 As shown, the specific method is as follows:

[0220] S1: Start;

[0221] S2: preset dehydration time T1, T2, T1<T2;

[0222] S3: Control the barrel and impeller of the washing equipment to increase the speed of rotation for dehydration;

[0223] S4: After dehydration time T1, the barrel and the impeller are controlled to stop speeding up and rotate at a constant speed;

[0224] S5: After dehydration time T2, the motor is controlled to stop rotating;

[0225] S6: Preset time T3, after interval T3, control to start the spraying program;

[0226] S7: preset spraying time T4, T5, T4<T5;

[0227] S8: After the spraying program is started for T4 time, the dehydration program is controlled to start;

[0228] S9: After the spraying program is turned on for T5 time, the spraying program is controlled to be turned off;

[0229] S10: Determine whether the preset number of spraying and dehydration times has been reached. If so, execute S11; otherwise, execute S4;

[0230] S11: Control the washing device to close the drainage channel to allow water to enter, and control the impeller and the barrel to rotate for rinsing after reaching a preset water level;

[0231] S12: After rinsing for a preset time, control drainage and spin drying;

[0232] S13: End.

[0233] In steps S4 and S5, the barrel and the impeller are controlled to stop increasing speed in the final stage of dehydration, so that a better dehydration effect can be obtained while the speed does not increase too high, thereby shortening the time required for the impeller and the barrel to decelerate.

[0234] In step S6, the spraying program is restarted after an interval of T3 after the drainage is stopped. This can prevent the inertial rotation speed of the impeller and the barrel from being too high when the drainage has just ended, so that the water sprayed on the clothes is removed before it penetrates into the clothes, affecting the rinsing effect.

[0235] In steps S8 and S9, when the spraying program has not yet stopped, the dehydration is started in advance, and the spraying can be continued when the dehydration speed is still low. There is no need to complete all the spraying before starting the dehydration, which speeds up the washing process.

[0236] For example, in a washing process, the dehydration lasts for 30 seconds. From the beginning of dehydration to the 25th second, the impeller and the barrel rotate at an increasing speed. From the 25th second to the 30th second, the impeller and the barrel rotate at a constant speed at the 25th second of dehydration. At the 30th second of dehydration, the control motor stops providing power to the impeller and the barrel, so that the impeller and the barrel enter the inertial rotation state. After the impeller and the barrel rotate for 5 seconds, the spray program is turned on and maintained for 10 seconds.

[0237] Furthermore, during the first 10 seconds of starting the spin cycle, the rotation speed of the impeller and the barrel is relatively low, and the water sprayed on the clothes will not be removed, so spraying can continue during the first 10 seconds of starting the spin cycle.

[0238] After each spraying, a dehydration will be performed to remove the water sprayed into the clothes together with the residual detergent.

[0239] In steps S2 to S10, the drainage channel of the washing device is always open, and the water in the barrel can flow out of the washing device at any time during spraying and dehydration.

[0240] The number of spraying and dehydration times described in step S10 can be pre-set or adjusted according to the amount of laundry. The amount of laundry can be represented by the water level in the barrel during the main wash. The method for determining the dehydration time, interval time (i.e., time T3 in step S6), spraying time, and number of spraying times according to the water level is shown in Table 1.

[0241] Table 1

[0242]

[0243]

[0244] The main wash water levels 1 to 10 in Table 1 refer to the water level heights from low to high, and the corresponding amount of clothes is also from small to large. Furthermore, the required dehydration time is also from short to long. Furthermore, the dehydration speed is higher and the rotational inertia is greater, so it takes a longer interval time to reduce the speed to the point where the spray program can be started.

[0245] The present invention also provides a washing device, which is controlled by the spray control method of the present invention. The washing device refers to a device for washing clothes, mainly a washing machine, including a pulsator washing machine and a drum washing machine.

[0246] The washing device includes a barrel for accommodating clothes, a pulsator at the bottom of the barrel, and a motor for providing power for the rotation of the pulsator and the barrel. The washing device also includes a nozzle for spraying water into the barrel. The nozzle can be arranged on the inner side of an upper cover of the washing device. If the barrel is provided with a barrel cover separately, the nozzle can be arranged on the inner side of the barrel cover.

[0247] The washing machine also includes a current measuring device for measuring the motor current, a distance sensor for measuring the water level in the barrel, and a weight sensor for measuring the weight of the clothes in the barrel.

[0248] In the present invention, whether the clothes have reached the upper limit of water absorption saturation is determined by detecting the current change of the motor during spraying, and after the clothes have reached the upper limit of water absorption saturation, the spraying program is controlled to be turned off, so that the clothes can be completely soaked in water, and too much water can be prevented from being sprayed, which causes the clothes to be unable to absorb water and directly flow away, resulting in waste.

[0249] As an embodiment of the present invention, the washing device also includes a camera, which is arranged on the inner side of the upper cover of the washing device. If the barrel body is provided with a separate barrel cover, the camera can also be installed on the barrel cover. The camera can also be arranged in other positions as long as it can obtain the image inside the barrel body.

[0250] In this embodiment, the camera of the washing machine can obtain the image inside the barrel after dehydration, and then determine the position of the clothes, and then accurately spray water on the clothes to prevent the water sprayed into the barrel from flowing away directly without touching the clothes, which saves water and increases the speed at which the clothes absorb water.

[0251] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A spray control method for a washing machine, comprising a spray program for spraying clothes, characterized in that: During the spraying process, it is determined whether the water absorption saturation of the clothes has reached the upper limit. If so, the spraying program is controlled to be turned off.

2. A spray control method for washing equipment according to claim 1, characterized in that: The washing device includes a motor that provides power for the rotation of the impeller and the barrel. During the spraying process, the impeller and / or the barrel are controlled to rotate. The preset current threshold I a , the step of judging whether the water absorption saturation of the clothing has reached an upper limit comprises: Control to obtain the motor current value I n , compare the obtained current value I n With the preset current threshold I a If the current value I obtained within the set time is n Both are at the current threshold I a If the water saturation of the clothes is within the range of , it is determined that the water absorption saturation of the clothes has reached the upper limit.

3. The spray control method of a washing device according to claim 1, characterized in that: The washing device includes a motor that provides power for the rotation of the impeller and the barrel. During the spraying process, the impeller and / or the barrel are controlled to rotate. The preset current threshold I a and number of times N0, the determination of whether the water absorption saturation of the clothing has reached the upper limit comprises: Control to obtain the motor current value I n , compare the obtained current value I n With the preset current threshold I a The size of the current threshold I is controlled to obtain the continuous a Current value within the range I n The number of times N, if N ≥ N0, it is determined that the water absorption saturation of the clothes has reached the upper limit, where N0 ≥ 2.

4. A spray control method for washing equipment according to any one of claims 1 to 3, characterized in that: Preset spraying time T MAX , control to obtain the spraying time T of the washing equipment, compare the obtained spraying time T with the preset time T MAX The size of MAX , then the control shuts down the spray program.

5. A spray control method for washing equipment according to any one of claims 1 to 3, characterized in that: After the spraying program is closed, control the dehydration of the washing equipment; Preferably, the water absorption saturation of the clothes is controlled and the dehydration speed is controlled to be in a positive correlation with the water absorption saturation of the clothes.

6. A spray control method for washing equipment according to claim 5, characterized in that: The control obtains the water absorption of the clothes and determines whether the water absorption of the clothes is strong. If the water absorption of the clothes is strong, the washing device is controlled to spray again after the dehydration is completed.

7. A spray control method for washing equipment according to claim 6, characterized in that: The method of judging the water absorption of clothing includes: The water level difference △H is preset. In the main wash stage, the control obtains the water level change difference △H' in the barrel within the set time, and compares the size of △H' with △H. If △H'≥△H, it is judged that the clothes have strong water absorption; Alternatively, a current difference △I is preset, and when the spray program is turned on, the control obtains the change value △I' of the motor current within the set time, and compares the size of △I' with △I. If the current change value △I'≥△I, it is judged that the clothing has strong water absorption.

8. The spray control method of a washing device according to claim 5, characterized in that: The load in the barrel is obtained by controlling the spraying times to be positively correlated with the load in the barrel.

9. A spray control method for washing equipment according to claim 2 or 3, characterized in that: After the washing equipment is dehydrated, the barrel and the impeller are controlled to stop rotating, the position of the clothes in the barrel is obtained, and the spraying program is controlled to start spraying water on the clothes; Alternatively, the barrel body and / or the impeller are controlled to rotate, and a spraying program is controlled to start spraying water toward the inner wall around the barrel body.

10. A washing device, characterized in that: The spray control method according to any one of claims 1 to 9 is used for control.

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