A method of dispensing a washing agent for a washing apparatus and a washing apparatus

Abstract

The application discloses a kind of washing equipment detergent dispensing method and washing equipment, preset detergent dispensing amount M', in water process, obtain the amount of detergent M that has been dispensed corresponding with the water level height in the current washing equipment barrel, compare the size of the amount of M that has been obtained with preset dispensing amount M', if M >= M', then control stops dispensing detergent.In the present application, the washing equipment does not need to install flow sensor for detecting the amount of detergent dispensing, the amount of detergent that has been dispensed corresponding with the water level height in the barrel can be obtained, and then it is judged whether the amount of detergent that has been dispensed reaches the preset dispensing amount, if M >= M', it indicates that the amount of detergent M that has been dispensed has reached the preset dispensing amount M', at this time, the dispensing of detergent is controlled to stop, and the amount of detergent dispensing is accurately controlled in the washing equipment without flow sensor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a method for dispensing detergent in a washing device and the washing device. BACKGROUND

[0002] A washing device refers to a device for washing articles such as clothes that need to be cleaned. Such a device usually uses water to complete the washing. In order to improve the cleaning effect, detergent needs to be dispensed into the water.

[0003] There are two kinds of current automatic detergent dispensing devices, namely negative pressure type and pump dispensing type. The negative pressure type automatic detergent dispensing device uses a Venturi tube and other structures to use the negative pressure generated by the water inlet to wash out the detergent from the automatic dispensing device, mix with the water, and enter the barrel of the washing device together.

[0004] The dispensing speed of this negative pressure type automatic detergent dispensing device depends on the size of the negative pressure, and the size of the negative pressure depends on the flow rate of the water inlet. Therefore, the dispensing speed of the negative pressure type automatic detergent dispensing device cannot be directly controlled, and only the dispensing speed of the detergent can be directly or indirectly detected, and then the dispensing amount can be controlled.

[0005] The current method for detecting the dispensing speed of the negative pressure type automatic detergent dispensing device is generally to set a flow sensor or other similar device in the water inlet pipeline to detect the flow rate of the water flow, and then calculate the corresponding dispensing speed of the detergent by a calculation method pre-existing in the washing device.

[0006] Some washing devices do not reserve a mounting position for the flow sensor when designed, or the flow sensor is damaged during use, resulting in the washing device being unable to detect the dispensing speed of the detergent.

[0007] Therefore, the present application is proposed. SUMMARY

[0008] The present application proposes a method for dispensing detergent in a washing device and a washing device, aiming to accurately control the dispensing amount of detergent in a washing device without a flow sensor or with a damaged flow sensor.

[0009] To solve the above technical problems, the basic idea of the technical solution of the present application is:

[0010] A method for dispensing detergent in a washing device, a preset detergent dispensing amount M' is obtained, during the water inlet process, a dispensing amount M corresponding to the water level height H in the barrel of the current washing device is obtained, the size of the obtained dispensing amount M and the preset dispensing amount M' is compared, if M≥M', the dispensing of the detergent is controlled to stop.

[0011] Further, a calculation model M=K*(V0+π*R2 *H) or Where V0 is a preset value, R is the radius of the barrel, K is a coefficient less than 1, and L is the distance from the opening to the bottom of the barrel.

[0012] Obtaining the amount of detergent dispensed M includes: obtaining the current water level height H in the tub, and substituting the obtained height H into the preset calculation model to obtain the amount of detergent dispensed M.

[0013] Furthermore, the inlet water pressure P of the washing equipment is controlled, and the coefficient K is controlled to be positively correlated with the inlet water pressure P;

[0014] Preferably, obtaining the inlet water pressure P of the washing equipment includes: controlling the change in water level H in the tub over time t1, ΔH, and calculating the rate of change V of the water level. H = ΔH / t1, obtain the rate of change V of water level height. H The corresponding inlet water pressure P.

[0015] Furthermore, the viscosity D of the detergent is obtained, and the coefficient K is controlled to be negatively correlated with the viscosity D of the detergent.

[0016] Furthermore, comparing the obtained amount of detergent dispensed M with the preset amount M' includes: obtaining the time T between the start of water intake and the start of water level rise in the tank, and obtaining the detergent dispensing rate V after the water level starts to rise. M Calculate the amount of detergent M that was added before the water level in the tank started to rise. 前 =V M *T,

[0017] The dosage M already added is corrected to obtain the corrected washing dosage M. 修正 =M 前 +M, compare the corrected delivery volume M 修正 The size of the preset delivery amount M'.

[0018] Furthermore, the determination of the detergent dispensing speed V M This includes: controlling the amount of detergent dispensed corresponding to the change in water level in the tank per unit time, which is the detergent dispensing speed.

[0019] Furthermore, determining whether the water level inside the bucket has started to rise includes: setting a preset water level height H0 inside the bucket, obtaining the water level height H in the bucket, determining the magnitude of the water level height H in the bucket and the preset water level height H0, and if H ≥ H0, then it is determined that the water level inside the bucket has started to rise.

[0020] Furthermore, after the washing equipment starts to receive water, the water level H inside the tub is controlled and monitored. When the water level H rises, the detergent is started to be added.

[0021] Furthermore, determining whether the water level H inside the tank has started to rise includes: a preset water level height H and a rising speed V inside the tank. 预 The actual rate of rise (V) of the water level inside the tank is obtained. 升 Compare the actual rate of ascent V obtained 升 With the preset ascent speed V 预 The size of V 升 ≥V 预 If so, it is determined that the water level H inside the tank has started to rise.

[0022] A washing device, controlled by any of the above-described dispensing methods.

[0023] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0024] 1. By obtaining the water level in the tub through the existing water level sensor in the washing equipment, the amount of detergent that has been added to the tub with the incoming water can be calculated using a preset function. This eliminates the reliance on installing a flow sensor in the washing equipment and enables accurate measurement of detergent dosage on washing equipment without a flow sensor or with a damaged flow sensor, thereby controlling the amount of detergent added.

[0025] 2. When the same volume of water flows through a detergent dispensing device, the total amount of detergent drawn in will vary depending on the inlet water pressure. Higher inlet water pressure results in a larger amount of detergent drawn in, while lower inlet water pressure results in a smaller amount. By obtaining the inlet water pressure and controlling the detergent dispensing accordingly—stopping dispensing earlier when the pressure is high and delaying it when the pressure is low—the accuracy of detergent dispensing can be effectively improved.

[0026] 3. In the initial stage of water intake, the washing equipment mainly absorbs the water from the clothes to be washed. At this time, the water level in the tub hardly rises, which means that the detergent added at this time cannot be reflected in the water level. Record the duration of this stage, and then obtain the detergent addition speed after the water level in the tub starts to rise. Use this speed as the average addition speed to calculate the detergent added before the water level in the tub starts to rise. This can avoid errors caused by the clothes to be washed absorbing water and make the addition more accurate.

[0027] 4. The washing device using the dispensing method of the present application can determine the amount of detergent to be dispensed using only the water level sensor without a flow sensor, and thus control the washing device using the negative pressure type detergent dispensing device to accurately dispense the detergent.

[0028] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are part of the present application, serve to further understand the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application but do not constitute an improper limitation on the present application. Obviously, the accompanying drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor based on the drawings. In the drawings:

[0030] Figure 1 is a detergent dispensing method of a laundry treatment apparatus of the present application;

[0031] Figure 2 is another detergent dispensing method of a laundry treatment apparatus of the present application;

[0032] Figure 3 is still another detergent dispensing method of a laundry treatment apparatus of the present application;

[0033] Figure 4 is still another detergent dispensing method of a laundry treatment apparatus of the present application;

[0034] Figure 5 is still another detergent dispensing method of a laundry treatment apparatus of the present application.

[0035] It should be noted that the accompanying drawings and the written description are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application but not to limit the scope of the present application.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The present application provides a washing equipment detergent dispensing method as shown in Figures 1 to 5 The present application provides a washing equipment detergent dispensing method as shown in

[0040] The washing equipment detergent dispensing device is a negative pressure type washing equipment detergent dispensing device.

[0041] The negative pressure type washing equipment detergent dispensing device is provided with a washing equipment detergent box for containing washing equipment detergent and a Venturi tube structure. When water flows through the Venturi tube structure, negative pressure is generated to suck washing equipment detergent out of the washing equipment detergent box, mix with the water flow, and enter the barrel. The negative pressure type washing equipment detergent dispensing device is connected to the water inlet pipeline of the washing equipment.

[0042] The negative pressure type washing equipment detergent dispensing device can only control the dispensing or stop of the washing equipment detergent, but cannot control the dispensing speed. Therefore, the dispensing speed or amount of the washing equipment detergent needs to be detected by a direct or indirect method, and then the dispensing is controlled to stop after the preset dispensing amount is completed.

[0043] The present application provides a washing equipment detergent dispensing method as shown in Figure 1 The present application provides a washing equipment detergent dispensing method as shown in

[0044] S1: start;

[0045] S2: preset the washing equipment detergent dispensing amount M' corresponding to the washing program;

[0046] S3: control the water inlet of the washing equipment;

[0047] S4: control the washing equipment detergent dispensing device to dispense washing equipment detergent;

[0048] S5: obtaining the water level height H in the tub;

[0049] S6: obtaining the amount of detergent M already dosed corresponding to the water level height H in the current tub;

[0050] S7: comparing the amount of detergent M already dosed with the preset amount of detergent M' to be dosed; if M≥M', executing S6, otherwise executing S5;

[0051] S8: controlling to stop dosing detergent;

[0052] S9: ending.

[0053] The S4 controlling the detergent dosing device to dose detergent refers to opening the detergent dosing device to allow the negative pressure generated by the water flow to suck out the detergent. The S8 controlling to stop dosing detergent refers to closing the detergent dosing device so that the negative pressure generated by the water flow cannot suck out the detergent.

[0054] The S6 obtaining the amount of detergent M already dosed corresponding to the water level height H in the current tub: a calculation model M=f1(H) is preset, the water level height H in the current tub is obtained, and the obtained height H is input into the calculation model M=f1(H) to obtain the amount of detergent M already dosed.

[0055] When the washing apparatus is a pulsator washing machine, M=f1(H) is specifically:

[0056] M=K*(V0+π*R 2 *H), wherein V0 is a preset value representing the amount of water entering positions other than the tub of the washing apparatus, such as the water amount entering the drain waterway, the lint filter waterway, etc., R is the radius of the tub, and K is a coefficient less than 1.

[0057] When the washing apparatus is a drum washing machine, M=f1(H) is specifically:

[0058] wherein V0 is a preset value representing the amount of water entering positions other than the tub of the washing apparatus, such as the water amount entering the drain waterway, the lint filter waterway, etc., L is the distance from the tub mouth to the tub bottom, R is the radius of the tub, and K is a coefficient less than 1.

[0059] The above calculation model is referred to as M=f1(H) hereinafter.

[0060] Preferably, the coefficient K=1 / 1000.

[0061] The way of obtaining the water level height H in the tub in the S5 is: a water level sensor for detecting the water level height in the tub is arranged in the washing apparatus, and the water level height in the tub is obtained by reading the water level sensor.

[0062] In the present application, the washing equipment obtains the amount of the detergent M by calculating the water level in the tub after obtaining the water level in the tub, which only needs the water level sensor in the washing equipment for detecting the water level in the tub, thus getting rid of the dependence on the flow sensor in the water inlet pipeline and saving the flow sensor.

[0063] As an embodiment of the present application, the same volume of water absorbs different amounts of the detergent under different water inlet pressures when the detergent is put in. In order to correct the error caused by the water inlet pressure, the method for controlling the detergent putting in is as follows: Figure 2 As shown in the figure, the method for controlling the detergent putting in is as follows:

[0064] S1: start;

[0065] S2: preset the amount of the detergent M' corresponding to the washing program, and preset the relationship M=f1(H) between the water level H in the tub and the amount of the detergent M put in;

[0066] S3: control the water inlet of the washing equipment;

[0067] S4: control the detergent putting in device to put in the detergent;

[0068] S5: obtain the water inlet pressure P of the washing equipment;

[0069] S6: control the coefficient K in M=f1(H) to have a positive correlation with the obtained water inlet pressure P;

[0070] S7: obtain the water level H in the tub;

[0071] S8: calculate the amount of the detergent M put in M=f1(H);

[0072] S9: compare the amount of the detergent M put in with the preset amount of the detergent M'; if M≥M', execute S10, otherwise execute S7;

[0073] S10: control to stop putting in the detergent;

[0074] S11: end.

[0075] The water inlet pressure P refers to the water pressure in the water inlet pipeline, more specifically, the pressure difference between the inlet and the outlet of the water inlet pipeline.

[0076] In the embodiment, when the water inlet pressure is large, the negative pressure suction of the water flow to the detergent is enhanced, and the same volume of water flowing through the water inlet pipeline will suck out more detergent; when the water inlet pressure is small, the negative pressure suction of the water flow to the detergent is weakened, and the same volume of water flowing through the water inlet pipeline will suck out less detergent. The preset coefficient K is positively correlated with the water inlet pressure P, and the calculation of the amount of the detergent put in can be adjusted according to the water inlet pressure P, so that the putting is ended in advance when the water inlet pressure is high, and the putting is delayed to end when the water inlet pressure is low, thereby improving the accuracy of the control of the detergent putting.

[0077] As an embodiment of the embodiment, as shown in Figure 2 , the water inlet pressure P is obtained as follows:

[0078] The S5 comprises:

[0079] S51: preset the relationship P=f2(V H ) between the water inlet pressure P and the water level height H change rate V H ;

[0080] S52: control to obtain the water level height H1 in the barrel;

[0081] S53: control to obtain the water level height H2 in the barrel after the time t1;

[0082] S54: calculate the water level height change amount AH in the barrel;

[0083] S55: calculate the water level height change rate V H = AH / t1 in the barrel;

[0084] S56: calculate the water inlet pressure P=f2(V H ).

[0085] In the embodiment, without installing a pressure sensor, the water level sensor already in the washing equipment can be used to complete the measurement of the water inlet pressure P.

[0086] The principle is that: for the washing equipment, the barrel shape is fixed, so different water level heights correspond to a fixed water inlet amount respectively, and the water inlet amount per unit time is the water inlet flow, in the case that the water inlet pipeline diameter, surface material, smoothness and the like are determined, different water inlet flows correspond to a fixed water inlet pressure P respectively, and the relationship P=f2(V H ) between the water inlet pressure P and the water level height H change rate V H ) can be obtained through experiments.

[0087] As another embodiment of the application, as shown in Figure 3As shown, the viscosity of the detergent has a great influence on the dispensing speed, and the dispensing method of the detergent according to the different viscosity is as follows:

[0088] S1: start;

[0089] S2: preset the relationship between the detergent dispensing amount M' corresponding to the washing program, the water level H in the barrel and the amount M of the detergent already dispensed M=f1(H);

[0090] S3: control the water inlet of the washing equipment;

[0091] S4: control the detergent dispensing device to dispense the detergent;

[0092] S5: obtain the viscosity D of the detergent;

[0093] S6: control the coefficient K in M=f1(H) to be negatively related to the viscosity D of the detergent;

[0094] S7: obtain the water level H in the barrel;

[0095] S8: calculate the amount M of the detergent already dispensed M=f1(H);

[0096] S9: compare the amount M of the detergent already dispensed with the preset detergent dispensing amount M', if M≥M', execute S10, otherwise execute S7;

[0097] S10: control to stop dispensing the detergent;

[0098] S11: end.

[0099] The viscosity D refers to the flow ability of the detergent, the stronger the flow ability, the smaller the viscosity D, and the easier the negative pressure generated by the water flow to suck it out; the weaker the flow ability, the greater the viscosity D, and the more difficult the negative pressure generated by the water flow to suck it out.

[0100] There are many factors that affect the viscosity D of the detergent, for example, different brands of detergents have different viscosities, long-term storage of the detergent will cause a certain degree of moisture loss, increasing the viscosity D of the detergent, and some detergents are concentrated, and the viscosity D of the concentrated detergent will be significantly increased compared with the ordinary detergent.

[0101] In this embodiment, the coefficient K is controlled to be negatively related to the viscosity D of the detergent, when the viscosity of the detergent is large, the speed of the negative pressure generated by the water flow to suck out the detergent is slow, the control is delayed to end the dispensing, so that the washing equipment has sufficient time to suck out a sufficient amount of detergent; when the viscosity of the detergent is small, the speed of the negative pressure generated by the water flow to suck out the detergent is fast, the control is advanced to end the dispensing. The introduction of the coefficient K makes the dispensing of detergents with different viscosities more accurate.

[0102] As an embodiment of the present embodiment, the method for obtaining the viscosity D of the detergent is as follows:

[0103] The detergent dispensing device comprises a detergent box for containing the detergent, and a steel needle is arranged in the detergent box in a vertical direction and partially immersed in the detergent. The steel needle is connected to a measuring circuit, and a measuring instrument for detecting the resistance in the circuit is arranged in the circuit. When the liquid level of the detergent changes, the resistance of the steel needle connected to the measuring circuit will change accordingly.

[0104] After the detergent starts to be dispensed, the change of the resistance of the steel needle connected to the measuring circuit can be obtained by obtaining the change of the reading of the measuring instrument in the measuring circuit, and then the change of the length of the steel needle connected to the measuring circuit can be obtained, and then the change of the height of the liquid level of the detergent in the detergent box can be obtained, and then the dispensing speed of the detergent can be obtained.

[0105] The dispensing speed of the detergent obtained by the steel needle measurement is compared with the dispensing speed of the detergent corresponding to the water level change speed in the tub. If the dispensing speed of the detergent obtained by the steel needle measurement is larger, it indicates that the viscosity of the detergent is higher. If the dispensing speed of the detergent obtained by the steel needle measurement is smaller, it indicates that the viscosity of the detergent is lower.

[0106] Further, the difference between the dispensing speed of the detergent obtained by the steel needle measurement and the dispensing speed of the detergent corresponding to the water level change speed in the tub can be calculated, and a comparison table of the difference and the viscosity D of the detergent can be established to quantify the viscosity D of the detergent.

[0107] In the present embodiment, the dispensing speed of the detergent is measured by using the steel needle, and by comparing with the dispensing speed of the detergent corresponding to the water level change speed in the tub, the viscosity D of the detergent under different water inlet pressures can be obtained, and then the dispensing time of the detergent can be adjusted to make the dispensing more accurate.

[0108] It should be noted that because the accuracy of the steel needle measurement is limited, and because the detergent has a certain viscosity, the measurement result still has a certain hysteresis, so it cannot timely and accurately reflect the real-time change of the liquid level in the detergent box, and therefore it can only be used as an auxiliary means for detecting the viscosity D of the detergent and cannot be directly used for measuring the dispensing amount of the detergent.

[0109] As another embodiment of the present application, as shown in Figure 4 The present application detects the dispensing amount of the detergent by using the change of the water level in the tub, but because the laundry generally has a certain water absorption capacity, in a stage when the water starts to be added, the detergent is absorbed by the water and mixed with the water, enters the tub, and is absorbed by the laundry in the tub, and the water level in the tub does not rise.

[0110] To accurately count the detergent put in the above stage into the amount of detergent already put in, the control method is as follows:

[0111] S1: start;

[0112] S2: preset the relationship between the amount of detergent M put in and the water level H in the tub corresponding to the washing program M=f1(H);

[0113] S3: control the washing equipment to take in water;

[0114] S4: control the detergent putting device to put in detergent and start timing;

[0115] S5: obtain the water level information in the tub, if the water level rises, execute S6, otherwise execute S7;

[0116] S6: stop timing and record the accumulated time as T, execute S8;

[0117] S7: continue timing, execute S5;

[0118] S8: obtain the detergent putting speed V M ;

[0119] S9: calculate the amount of detergent M 前 already put in before the water level in the tub starts to rise M M =V 修正 *T;

[0120] S10: obtain the water level H in the tub;

[0121] S11: calculate the amount of detergent M put in after the water level starts to rise M=f1(H);

[0122] S12: obtain the corrected amount of detergent put in M 前 =M 修正 +M;

[0123] S13: compare the corrected amount of detergent put in M 修正 with the preset amount of put in M', if M M ≥M', execute S14, otherwise execute S10;

[0124] S14: control to stop putting in detergent;

[0125] S15: end.

[0126] In this embodiment, the time T that the detergent has been put in before the water level in the tub rises is obtained by timing, and then the putting speed V MAs the average speed of the detergent dispensing before the water level in the tub is raised, the amount of the detergent M already dispensed before the water level in the tub starts to rise is further calculated 前 = V M *T.

[0127] In the judgment of whether the dispensing is completed, the amount of the detergent M calculated above 前 is included, which can avoid the detection error of the amount of the already dispensed detergent caused by the water absorption of the laundry, prevent the over dispensing of the detergent, and accurately control the amount of the detergent dispensing.

[0128] As an embodiment of the present embodiment, as shown in Figure 4 , the control method for obtaining the speed V M of the detergent dispensing is as follows:

[0129] The S8 includes:

[0130] S81: control the timing from the time when the water level starts to rise;

[0131] S82: after the timing duration reaches t2, control the water level H2 in the tub to be obtained;

[0132] S83: calculate the amount of the detergent M2 corresponding to the obtained water level H2 = f1(H2);

[0133] S84: calculate the speed V M of the detergent dispensing = M2 / t2.

[0134] In the present embodiment, the increase of the water level in the tub within the preset time within the time t2 is obtained, the amount of the detergent dispensing M2 corresponding to the change of the water level is calculated according to M = f1(H), and finally the speed V M of the detergent dispensing = M2 / t2 is obtained, which can be completed without adding new detection devices.

[0135] As another embodiment of the present embodiment, when the water pressure is large, the water flow and the laundry collide and splash, so that part of the water splashes on the bottom of the tub when the laundry is still in the water absorption state, so that the water level rises slightly, which causes the misjudgment of whether the laundry is completely water absorbed when the above dispensing method is executed, and the timing ends too early. To solve this problem, as shown in Figure 4 , the following method for dispensing the detergent is used:

[0136] The step S5 of the present embodiment includes:

[0137] S51: preset the water level H0 in the tub;

[0138] S52: obtain the water level H in the tub;

[0139] S53: judging the height H of the water level in the tub and the preset water level height H0, if H≥H0, executing S54, otherwise executing S7;

[0140] S54: judging that the water level in the tub rises, executing S6;

[0141] In the embodiment, the preset water level height H0 is the water level height when the splashing water flow is accumulated at the bottom of the tub in the case of large water pressure, at this time, the laundry is still in the water absorption state, at this time, the water at the bottom of the tub is absorbed by the laundry and supplemented by the splashing water flow, forming a dynamic balance, which is always maintained at a lower level. When the obtained water level height H is greater than or equal to the preset water level height H0, it indicates that the dynamic balance is broken, and the water absorption of the laundry ends, at this time, the timing is ended, and the measurement of the time before the water level in the tub rises is more accurate, effectively avoiding over-dosing of the detergent.

[0142] As another embodiment of the present application, the water pressure in the water inlet pipeline may change when the detergent is dosed, for example, when the external water supply pipeline is opened or closed or other drain valves are opened or closed, which will affect the water pressure in the water inlet pipeline, and then change the detergent dosing speed. In this way, using the measured detergent dosing speed after the water level in the tub starts to rise as the average dosing speed to calculate the amount of detergent dosed before the water level in the tub starts to rise will not be accurate enough. In order to avoid the influence of water pressure fluctuation, for example, Figure 5 As shown in the figure, the dosing method adopted is as follows:

[0143] S1: starting;

[0144] S2: presetting the amount of detergent M' corresponding to the washing program, and presetting the relationship M=f1(H) between the water level height H in the tub and the amount of detergent M already dosed;

[0145] S3: controlling the washing equipment to take in water;

[0146] S4: controlling to obtain the water level height H in the tub;

[0147] S5: judging whether the water level height H in the tub rises, if yes, executing S6, otherwise executing S4;

[0148] S6: controlling the detergent dosing device to dose the detergent;

[0149] S7: obtaining the water level height H in the tub;

[0150] S8: calculating the amount of detergent M already dosed=f1(H);

[0151] S9: comparing the amount of detergent M already dosed with the preset amount of detergent M' to determine whether M≥M', if yes, executing S10, otherwise executing S7;

[0152] S10: controlling to stop dispensing the detergent;

[0153] S11: ending.

[0154] In the embodiment, the detergent is controlled to be dispensed when the water level in the tub starts to rise, i.e. the laundry no longer absorbs water. At this time, the change of the water level in the tub can fully reflect the water inflow in the tub, and further fully reflect the amount of the detergent to be dispensed, without being disturbed by the water absorption of the laundry, so that the washing device can detect the amount of the detergent to be dispensed more accurately, and further accurately control the amount of the detergent to be dispensed.

[0155] As an implementation manner of the embodiment, when the water level in the tub just starts to rise, the laundry is still slowly absorbing water, at this time, the water absorption is small and slow, and the water absorption speed is less than the water inflow speed, so the water level rises comprehensively, but at this time, due to the influence of the slow water absorption of the laundry, the water level in the tub cannot fully reflect the amount of the detergent to be dispensed. In order to exclude this influencing factor, as shown in FIG. 5, the following method for dispensing the detergent is adopted: Figure 5

[0156] The S5 in the embodiment includes:

[0157] S51: presetting a water level height H rising speed V 预 in the tub;

[0158] S52: acquiring an actual water level height rising speed V 升 in the tub;

[0159] S53: comparing the acquired actual rising speed V 升 with the preset rising speed V 预 , if V 升 ≥ V 预 , executing S54, otherwise executing S4;

[0160] S54: judging that the water level height H rises in the tub, and executing S6

[0161] In the implementation manner, the preset water level height H rising speed V 预 in the tub, when the actual water level height rising speed V 升 in the tub is less than the preset rising speed V 预 , it is considered that at this time, the water level starts to rise, but the laundry still has strong water absorption, the water level height in the tub cannot fully reflect the water inflow, and further cannot fully reflect the amount of the detergent to be dispensed. When the actual water level height rising speed V 升 in the tub is greater than or equal to the preset rising speed V 预 ​At this point, it is assumed that the water absorption of the clothes to be washed is negligible, and the water level in the tub can fully reflect the amount of water entering, and thus the amount of detergent added.

[0162] This method of detergent dispensing effectively eliminates the influence of the amount of water absorbed by the laundry after the water level in the tub begins to rise on the amount of detergent dispensed, thus further improving the accuracy of detergent dispensing.

[0163] The present invention also proposes a washing device, wherein the washing device is controlled by the detergent dispensing method of the present invention. The washing device includes a tank for containing washing water and a water inlet pipe connected to the tank. One end of the water inlet pipe is connected to an external water supply pipe (such as a tap water pipe) of the washing device, and the other end is connected to the tank via a detergent dispensing device.

[0164] The detergent dispensing device is a negative pressure detergent dispensing device, which has an interconnected Venturi tube structure and an openable and closable detergent box for storing detergent. When the water in the water inlet pipe flows through the Venturi tube, a negative pressure is generated, which draws the detergent out from the detergent box connected to it and mixes it with the water inlet flow, and they enter the tank together.

[0165] The barrel is equipped with a water level sensor for detecting the water level inside the barrel.

[0166] In this embodiment, the washing equipment can obtain water level information through a water level sensor installed in the tub. Given a fixed tub shape and size, the corresponding water inflow can be determined. Furthermore, by using a preset relationship between the water inflow and detergent dosage, the detergent dosage can be determined. This washing equipment can determine the detergent dosage using only a water level sensor, even without a flow sensor, thereby controlling the precise detergent dispensing of the equipment using a negative pressure detergent dispensing device.

[0167] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method of dispensing a washing agent for a washing apparatus, characterized by: A preset detergent dosage M' is set, and during the water inlet process, a dosage M of the detergent that has been dosed corresponding to a water level H in the tub of the washing machine is obtained, and the obtained dosage M and the preset dosage M' are compared, and if M≥M', the dosing of the detergent is stopped. The comparison of the obtained amount M and the preset amount M' includes: obtaining a time T between the start of water inflow and the start of the water level rising in the barrel, obtaining a detergent dispensing speed V after the start of the water level rising in the barrel M , calculating the amount M of the detergent already dispensed before the start of the water level rising in the barrel 前 =V M *T, correcting the amount M, to obtain a corrected amount M 修正 =M 前 +M, comparing the corrected amount M 修正 with the preset amount M' The acquisition of the detergent dispensing speed V M The method comprises: controlling the amount of detergent that has been dispensed corresponding to the change in the water level in the tub per unit time, i.e., the detergent dispensing speed. The judgment of whether the water level in the tub starts to rise comprises: presetting a water level H0 in the tub, obtaining the water level H in the tub, and judging the water level H in the tub and the preset water level H0, and if H≥H0, it is determined that the water level in the tub starts to rise.

2. The method according to claim 1, characterized in that: Pre-design calculation model Wherein, V0 is a preset value, R is the radius of the barrel, K is a coefficient less than 1, and the obtained detergent amount M includes: obtaining the water level height H in the current barrel, and substituting the obtained height H into the pre-design calculation model to obtain the detergent amount M.

3. A method of dispensing a washing agent for a washing apparatus according to claim 2, characterized in that: The water pressure P of the water inlet of the washing machine is obtained, and the coefficient K is controlled to have a positive correlation with the water pressure P.

4. A method of dispensing a washing agent for a washing apparatus according to claim 3, characterized in that: Obtaining the inlet water pressure P of the washing equipment includes: controlling and acquiring the change in water level H in the tub over time t1, ΔH, and calculating the rate of change V of the water level. H =△H / t1, obtain the rate of change of water level V H The corresponding inlet water pressure P.

5. The method of claim 2, wherein the detergent is a granular detergent. The viscosity D of the detergent is obtained, and the coefficient K is controlled to have a negative correlation with the viscosity D of the detergent.

6. A method according to any one of claims 1 to 5, wherein: After the water inlet of the washing machine is started, the water level H in the tub is obtained, and when the water level H rises, the dosing of the detergent is started.

7. A method of dispensing a washing agent for a washing apparatus according to claim 6, characterized in that: The step of determining whether the water level H in the barrel starts to rise comprises: presetting a water level rising speed V 预 in the barrel 升 , acquiring an actual water level rising speed V 升 in the barrel 升 , comparing the acquired actual water level rising speed V 升 with the preset water level rising speed V 预 , and determining that the water level H in the barrel starts to rise if V 升 ≥ V 预 .

8. A washing apparatus characterized by: The dosing method of any one of claims 1 to 7 is adopted for control.

9. A washing apparatus as claimed in claim 8, characterised in that: The washing machine is a pulsator washing machine.

10. A washing apparatus as claimed in claim 8, wherein: The washing machine further comprises a tub for containing washing water and a detergent dosing device in communication with the tub. The detergent dosing device is a negative pressure type detergent dosing device.

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