Automatic laundry detergent adding system and control method thereof

Abstract

The invention discloses an automatic laundry detergent adding system and a control method thereof. The system comprises a control host, a laundry detergent storage container, a laundry detergent weighing device, a laundry detergent adding device and a laundry detergent diluting and mixing device; the laundry detergent storage container is arranged on the laundry detergent weighing device, and the laundry detergent storage container outputs to the laundry detergent adding device; the laundry detergent adding device outputs to the laundry detergent diluting and mixing device; the water inlet of the laundry detergent diluting and mixing device is connected to a tap water pipe, and the water outlet thereof is connected to the water inlet pipe of a washing machine, and a water inlet meter is installed on the laundry detergent diluting and mixing device; the input end of the control host is electrically connected to the laundry detergent weighing device and the water inlet meter respectively, and the output end of the control host is electrically connected to the laundry detergent adding device.

Description

Technical Field

[0001] The present invention relates to the technical field of washing equipment, and in particular to a laundry detergent automatic adding system and a control method thereof. Background Art

[0002] The active ingredient of laundry detergent is mainly non-ionic surfactant, which weakens the adhesion between stains and clothes, and removes stains from clothes under the action of mechanical forces such as washing water flow, hand rubbing or washing machine stirring, so as to achieve the purpose of cleaning clothes. In order to achieve a good decontamination effect, the detergent should contain enough active ingredients. In order to ensure the washing effect of detergents, the national competent authorities have stipulated the minimum content of active ingredients in detergents.

[0003] The amount of laundry detergent added during washing is based on the concentration of laundry detergent per liter of water to achieve the desired cleaning effect. The amount of laundry detergent commonly used on the market for machine washing is indicated at a ratio of 1.3-1.4 grams per liter of water.

[0004] In the laundry process, the accuracy of adding detergent directly affects the laundry effect and laundry cost. At present, most household washing machines add detergent manually, which makes it impossible to accurately add the proportion of detergent, and the amount of water entering the laundry will also be incorrect, further reducing the accuracy of the amount of detergent added, resulting in the problem that the amount of washing water and the concentration of detergent cannot be guaranteed.

[0005] The existing laundry detergent addition calculation scheme uses the pump output multiplied by the time to calculate the addition amount. This method can be used for conditions where the viscosity of the laundry detergent is extremely low. However, the viscosity of the laundry detergent commonly used on the market varies, and it is difficult for many brands of laundry detergent manufacturers to unify the viscosity. In particular, temperature changes have a greater impact on viscosity. The viscosity is high at low temperatures and low at high temperatures. It can be seen that the amount of laundry detergent pumped out will also be different with different viscosities. The method of multiplying the pump output by the time will result in a large error in the actual amount of laundry detergent added at different viscosities and temperatures, which will result in inaccurate addition of laundry detergent, or too much or too little laundry detergent.

[0006] There are also technologies that propose that before adding laundry detergent, you should first check the water level of the washing machine or manually select the water inlet gear, and then manually calculate and adjust the parameters of the amount of addition corresponding to the water level based on the above water inlet gear information. But you should know that the capacity of washing machines is getting larger and larger, and some washing machines have 10 or more water levels. How can users accurately evaluate how many liters of water are in each gear? Moreover, for the same washing machine and the same water level gear, there will be a 2-5L water volume error for each wash. Such a technical solution is very troublesome and troublesome for users to use every time. The error of the washing machine water level and the error of manually judging the water level corresponding to the water level also lead to inaccurate addition of laundry detergent, and too much or too little laundry detergent is added.

[0007] Another solution is to integrate it with the washing machine. The water metering and detergent metering are the methods mentioned above. It does not help to add the exact amount of detergent. The washing machine system directly provides water level data information to the detergent adding system. If users want an automatic detergent adding device, they must buy it together with the washing machine, and the washing machine with the detergent adding function is more expensive. Summary of the invention

[0008] The purpose of the present invention is to develop a laundry detergent automatic adding system and control method for adding laundry detergent to a washing machine in view of the poor adding precision and the disproportion between the added amount and the water intake in the existing control method for adding laundry detergent and the manual adding method. The laundry detergent and the water intake of the present invention are actually measured and added in proportion, thereby improving the adding precision of the laundry detergent.

[0009] In order to solve the above technical problems, the present invention discloses an automatic laundry detergent adding system, comprising a control host, a laundry detergent storage container, a laundry detergent weighing device, a laundry detergent adding device and a laundry detergent diluting and mixing device; the laundry detergent storage container is arranged on the laundry detergent weighing device, and the laundry detergent storage container outputs to the laundry detergent adding device; the laundry detergent adding device outputs to the laundry detergent diluting and mixing device; the water inlet of the laundry detergent diluting and mixing device is connected to a tap water pipe, and the water outlet thereof is connected to the water inlet pipe of a washing machine, and a water inlet meter is installed on the laundry detergent diluting and mixing device; the input end of the control host is electrically connected to the laundry detergent weighing device and the water inlet meter respectively, and the output end of the control host is electrically connected to the laundry detergent adding device.

[0010] Preferably, the present solution also includes a laundry detergent heating device, which includes a heating mechanism and an ambient temperature sensor; wherein the heating mechanism is arranged in the laundry detergent storage container, and is electrically connected to the output end of the control host; the ambient temperature sensor is arranged at any place that can contact the environment, and is electrically connected to the input end of the control host.

[0011] Preferably, the heating mechanism is an electric heating wire, which extends from the laundry liquid storage container to a laundry liquid suction pipe used to connect the laundry liquid storage container and the laundry liquid adding device.

[0012] Preferably, a pressure reducing solenoid valve is provided between the water inlet and the water inlet meter.

[0013] Preferably, a laundry detergent adding check valve is provided between the laundry detergent adding device and the laundry detergent diluting and mixing device.

[0014] Preferably, the present solution further comprises a laundry liquid inlet filter, which is arranged in the laundry liquid storage container, the laundry liquid heating device is arranged in the laundry liquid inlet filter, and the laundry liquid suction pipe extends into the laundry liquid inlet filter.

[0015] A method for automatically adding laundry detergent includes a proportional addition control method and / or a quantitative addition control method.

[0016] Wherein, the proportional addition control method comprises the following steps:

[0017] (11) First addition: Real-time detection of the washing water flow rate. When the cumulative water flow reaches the set amount of water for the first addition of laundry detergent, start adding laundry detergent. When the weight of the added laundry detergent reaches the set proportion of the first addition, stop adding laundry detergent and enter the step-by-step addition step.

[0018] (12) Step-by-step addition: Real-time detection of the washing water flow rate. When the cumulative water flow reaches the set first step water volume, add laundry detergent. When the weight of the laundry detergent added reaches the proportional weight set for the first step, stop adding laundry detergent.

[0019] (13) Repeat step (12) until the washing machine finishes washing water, stops water inlet, and completes the laundry detergent addition procedure;

[0020] The quantitative addition control method comprises the following steps:

[0021] (21) Real-time detection of the washing water flow rate, when the cumulative water intake reaches the set quantitative addition of laundry detergent water volume, add laundry detergent, and when the weight of the laundry detergent added reaches the quantitative addition set ratio weight, the addition of laundry detergent is stopped;

[0022] (22) Continue to measure the water intake until the washing machine has finished washing, then stop the water intake and complete the laundry detergent addition procedure.

[0023] Preferably, during the process of adding laundry detergent, the ambient temperature is detected. When the ambient temperature is lower than the set temperature of 20°C, the laundry detergent is heated to reduce the viscosity of the laundry detergent and improve the fluidity. At the same time, the laundry detergent adding pump automatically increases the speed to speed up the laundry detergent adding speed. When the ambient temperature is higher than the set temperature of 20°C, the control host automatically adjusts the optimal speed of the laundry detergent adding pump according to the change in ambient temperature to improve the accuracy of laundry detergent adding.

[0024] Preferably, the laundry detergent remaining amount detection program is run immediately after the machine is turned on to first detect the remaining amount information of the laundry detergent. If the remaining amount is lower than the set value, the adding program will not be executed and an alarm message will be issued.

[0025] Preferably, after stopping the washing water supply, continue to detect the water supply signal. After there is no water supply signal, continue to wait for 2-5 minutes. If there is no water supply signal within the waiting time range, exit the adding process and issue a 2-second sound message reminder, indicating that the laundry detergent adding procedure is completed.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The present invention calculates the amount of laundry added according to the measured washing water intake, which solves the error caused by directly obtaining the water intake from the washing machine, improves the accuracy of adding laundry detergent, and solves the problem of excessive waste of laundry detergent and poor cleaning effect due to insufficient amount.

[0028] 2. The present invention automatically calculates the washing water intake, and calculates the actual added amount of laundry detergent by multiplying the washing water intake by the laundry detergent addition ratio; specifically: the washing water intake is the real-time water intake measured by the flow sensor, and the laundry detergent addition amount is the measured addition amount calculated in proportion (weighed by an electronic scale), that is, the actual washing water intake is multiplied by the addition ratio coefficient to calculate the actual added amount of laundry detergent.

[0029] 3. The invention automatically controls the speed of the laundry detergent adding pump at a temperature, automatically heats the laundry detergent delivery pipeline at a low temperature, reduces the viscosity of the laundry detergent, and can also improve the solubility and activity of the laundry detergent.

[0030] 4. The present invention can display the added weight of the laundry detergent and the amount of water intake in real time during operation. Whether it is a pulsator washing machine or a drum washing machine, it can be used in conjunction with the product without any modification, and no special laundry detergent is required.

[0031] 5. In the proportional addition method of the present invention, the addition of laundry detergent is calculated based on the cumulative amount of water intake, and the process is completed in multiple subdivided steps, automatically calculating the cumulative amount of water intake in each step and the cumulative weight of each step of the proportional addition of laundry detergent.

[0032] 6. The present invention also has an auxiliary function of "quantitative addition" to facilitate the user to adjust the fixed actual value addition amount through parameters when a fixed addition amount is required.

[0033] 7. The present invention is concise and clear, has high control accuracy, simple method, easy system operation, saves laundry costs, and reduces the labor intensity of manual addition. It realizes the function of automatically adding laundry detergent with one-key operation, automatically identifies whether the addition is completed, and automatically shuts down after the addition is completed.

[0034] 8. The laundry detergent of the present invention is first mixed with water before being put into the washing machine, so that it can be fully dissolved in water, thereby achieving a better washing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of the automatic laundry detergent adding system;

[0036] Figure 2 Flow chart of the automatic laundry detergent addition control method.

[0037] Figure numerals: 1. Control host, 2. Laundry detergent storage container, 3. Laundry detergent weighing device, 31. Electronic weighing platform, 32. Electronic weighing sensor, 33. Mounting bracket, 4. Laundry detergent adding device, 41. Laundry detergent suction pipe, 42. Laundry detergent adding cut-in check valve, 43. Laundry detergent pump out conduit, 5. Laundry detergent dilution and mixing device, 51. Water inlet, 52. Water outlet, 53. Water inlet meter, 54. Step-down solenoid valve, 6. Laundry detergent heating device, 61. Heating mechanism, 62. Ambient temperature sensor, 7. Laundry detergent inlet filter. DETAILED DESCRIPTION

[0038] In order to make the purpose and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown, the present invention discloses an automatic laundry detergent adding system, comprising a control host 1, a laundry detergent storage container 2, a laundry detergent weighing device 3, a laundry detergent adding device 4 and a laundry detergent diluting and mixing device 5.

[0040] The laundry liquid storage container 2 is arranged on the laundry liquid weighing device 3, and the laundry liquid storage container 2 is connected to the laundry liquid adding device 4 through the laundry liquid suction conduit 41, and the laundry liquid adding device 4 is a laundry liquid adding pump. The laundry liquid adding device 4 is connected to the laundry liquid dilution and mixing device 5 through the laundry liquid pump outlet conduit 43, and a laundry liquid adding cut-in check valve 42 is installed on the laundry liquid pump outlet conduit 43. The water inlet 51 of the laundry liquid dilution and mixing device 5, that is, the water inlet of the system, is connected to the tap water pipe, and the water outlet 52 of the laundry liquid dilution and mixing device 5, that is, the water outlet of the system, is connected to the washing machine water pipe; a water inlet meter 53 is installed on one end of the laundry liquid dilution and mixing device 5 close to the water inlet 51, and the water inlet meter 53 is a water inlet electronic flow sensor; a pressure reducing solenoid valve 54 (normally open type) is provided between the water inlet 51 and the water inlet meter 53, and the function of the pressure reducing solenoid valve 54 is to reduce the pressure in the laundry liquid dilution and mixing device 5 so that the laundry liquid can be pumped into the laundry liquid dilution and mixing device 5.

[0041] The input end of the control host 1 is electrically connected to the laundry detergent weighing device 3 and the water inlet meter 53 to receive the laundry detergent weight signal and the water inlet signal. The output end of the control host 1 is electrically connected to the laundry detergent adding device 4 to control the addition of laundry detergent.

[0042] As a preferred embodiment, the system further includes a laundry liquid heating device 6, which includes a heating mechanism 61 and an ambient temperature sensor 62. The heating mechanism 61 is an electric heating wire, one end of the laundry liquid suction pipe 41 is inserted into the bottom of the laundry liquid storage container 2, and the other end is connected to the laundry liquid adding device 4 through a three-way connection. The electric heating wire is arranged in the laundry liquid suction pipe 41 and connected from the third port of the three-way connection to be electrically connected to the input end of the control host 1. The ambient temperature sensor 62 is installed on the mounting bracket 33 arranged on the laundry liquid weighing device 3, and is electrically connected to the input end of the control host 1.

[0043] As a preferred embodiment, the system further comprises a laundry liquid inlet filter 7, which is arranged in the laundry liquid storage container. A laundry liquid suction pipe 41 is arranged in the laundry liquid inlet filter 7, and the end of the electric heating wire is spirally coiled in the filter 7.

[0044] The laundry detergent weighing device 3 includes an electronic weighing platform 31, an electronic weighing sensor 32 and a mounting bracket 33. The electronic weighing sensor 32 is mounted on the mounting bracket 33 by screws, and the electronic weighing platform 31 is mounted on the electronic weighing sensor 32. The laundry detergent storage container 2 is arranged on the electronic weighing platform 31.

[0045] like Figure 2As shown, the present invention also discloses a laundry detergent automatic adding control method, including a proportional adding control method and / or a quantitative adding control method, and the two control methods do not interfere with each other.

[0046] Among them, the proportional addition control method is:

[0047] First, it prompts whether to modify the proportional weight coefficient of the added proportion; if there is modification information, it is added according to the modified proportional weight coefficient; if there is no modification information, it is added according to the last proportional weight coefficient.

[0048] Start the washing machine, start the weighing and proportional addition of laundry detergent, press the "proportional addition" button on the control host 1, the control host 1 enters the working state, and the "proportional addition" indicator light is on.

[0049] The proportional addition procedure is officially entered. The washing water intake and the amount of laundry detergent added are added in multiple times. The setting value of the first water intake is close to the lowest water level of the washing machine. It is appropriate to set the first water intake for washing to 10-20L (for example, the first water intake for washing is set to 10L, corresponding to the first laundry detergent addition setting amount of 10g). The control method includes the following steps:

[0050] (11) First addition: The control host 1 continuously detects the working state of the washing water inlet flow in real time. When the accumulated water volume of the water inlet meter 53 (water inlet electronic flow sensor) reaches the set real-time accumulated water volume of 10L for the first addition of laundry detergent, the control host 1 sends a signal to close the pressure reducing solenoid valve 54. After the pressure reducing solenoid valve 54 is closed for 2 seconds, the water pressure in the laundry detergent mixing device 5 decreases (the water inlet meter 53 continues to detect the water inlet flow to measure the first step-by-step addition of laundry detergent). At the same time, the laundry detergent adding pump is started. Under the suction action of the laundry detergent adding pump, the laundry detergent is sucked from the laundry detergent storage container 2 into the laundry detergent inlet. The laundry detergent enters the laundry detergent adding pump through the filter 7, the laundry detergent suction conduit 41, and the three-way connection. Under the pressure of the laundry detergent adding pump, the laundry detergent enters the laundry detergent adding check valve 42 from the laundry detergent pump outlet conduit 43 and then enters the laundry detergent mixing device 5, where it is mixed with the water flowing in from the water inlet 51. Finally, the laundry detergent enters the washing machine through the water outlet 52. When the control host 1 collects the signal that the weight of the laundry detergent added by the electronic weighing sensor 32 reaches the real-time weight of 13g of the set proportion for the first addition, the control host 1 sends a signal to stop the laundry detergent adding pump and the pressure reducing solenoid valve 54, and enters the step-by-step adding step.

[0051] (12) Step-by-step addition: The control host 1 continuously detects the working status of the washing water inlet flow in real time. When the water volume detected by the water inlet electronic flow sensor reaches the set first step cumulative water volume of 2L, the control host 1 sends a signal to close the step-down solenoid valve 54 (the water inlet meter 53 continues to detect the water inlet flow to measure the next step-by-step addition of laundry detergent). After the step-down solenoid valve 54 is closed for 2 seconds, the water pressure in the laundry detergent mixing device 5 decreases, and the laundry detergent adding pump is started at the same time. Under the suction action of the laundry detergent adding pump, the laundry detergent is sucked from the laundry detergent storage container 2 into the laundry detergent inlet filter 7, to the laundry detergent suction conduit 41, to the three-way connection, and then into the laundry detergent adding pump. Under the pressure of the laundry detergent adding pump, the laundry detergent enters the laundry detergent addition cut-in check valve 42 from the laundry detergent pump outlet conduit 43, and then enters the laundry detergent mixing device 5, where it is mixed with the water flowing in from the water inlet 51, and finally connected to the washing machine water pipe through the water outlet 52 to enter the washing machine. When the control host 1 detects that the weight of the added laundry detergent reaches the proportional weight of 2.6 g set in the first step, a signal is sent to stop the laundry detergent adding pump and the pressure reducing solenoid valve 54 .

[0052] (13) Repeat step (12) until the washing machine reaches the washing water level and stops feeding water. Finally, the control host 1 detects that there is no water flow signal feedback from the water inlet electronic flow sensor, and the control host 1 waits for 2-5 minutes in real time. If there is no water flow signal within the waiting time range, the control host 1 automatically exits the adding process and completes the addition of laundry detergent.

[0053] In this embodiment, the first addition is based on the lowest washing water volume of the washing machine, and the setting range is 5-30L. After the control host completes the first addition program, it directly enters the step-by-step addition program. The water volume of each step is based on the minimum subdivision water volume, and the setting range is 1-5L. (If the step water volume is set to 2L multiplied by the standard addition coefficient of 1.3g, the step addition amount is 2.6g each time. The total amount of water and laundry detergent added by step is calculated in a cumulative manner.)

[0054] The weight coefficient of laundry detergent addition is designed to be a ratio coefficient of 1.3g of laundry detergent added to 1L of water by default. The ratio coefficient for adding laundry detergent is obtained from the instructions on the laundry detergent bottle. The user can also modify the ratio coefficient as needed. The modified ratio coefficient range is 0.1-5.0g.

[0055] As shown in Table 1: Reference table for instructions on laundry detergent bottles

[0056] The ratio coefficient of laundry detergent and water volume in the pulsator washing machine can be obtained from the table: low water level 20g (laundry detergent) ÷ 15L (water) ≈ 1.3g / L, middle water level 40g (laundry detergent) ÷ 30L (water) ≈ 1.3g / L, middle water level 60g (laundry detergent) ÷ 45L (water) ≈ 1.3g / L.

[0057] The amount of laundry detergent to be added to the drum washing machine is obtained from the table. The washing water volume is 10-25L, and the parameter of the added ratio value is set to 1.0-3.0g. The set value can achieve the washing and decontamination effect, and the minimum amount of laundry detergent is appropriate.

[0058] If you need detailed addition amount, please refer to the product manual of laundry detergent and washing machine for standard dosage settings.

[0059] Table 1:

[0060] Reference table of laundry detergent usage

[0061]

[0062] Quantitative addition control method (laundry detergent and water intake are also added in proportion)

[0063] First, the washing water volume information prompts whether to modify the quantitative weight parameter information of the quantitative addition; if there is modification information, add according to the modified quantitative weight; if there is no modification information, add according to the weighing parameters of the last quantitative addition.

[0064] Start the washing machine, press the "quantitative addition" button on the control host 1, the control host 1 enters the working state, and the "quantitative addition" indicator light turns on.

[0065] Officially enter the quantitative addition procedure, the control method includes the following steps:

[0066] (21) The control host 1 continuously detects the working state of the washing water inflow in real time. When the accumulated water inflow of the water inlet electronic flow sensor reaches the set quantitative addition of laundry detergent water volume of 30L, the control host 1 sends a signal to close the pressure reducing solenoid valve 54. After the pressure reducing solenoid valve 54 is closed for 2 seconds, the water pressure in the laundry detergent mixing device 5 is reduced, and the laundry detergent adding pump is started at the same time. Under the suction action of the laundry detergent adding pump, the laundry detergent is sucked from the laundry detergent storage container 2 into the laundry detergent inlet filter 7, to the laundry detergent suction conduit 41, to the three-way, and then into the laundry detergent adding pump. Under the pressure of the laundry detergent adding pump, the laundry detergent is pumped out of the laundry detergent pump outlet conduit 43, to the laundry detergent adding check valve 42, into the laundry detergent mixing device 5, mixed with water, and then connected to the washing machine water pipe through the water outlet 52 to enter the washing machine. When the control host 1 collects the signal that the weight added by the electronic weighing sensor 32 reaches the real-time weight of the quantitative addition setting ratio of 39g, the control host 1 sends a signal to stop the laundry detergent adding pump and the pressure reducing solenoid valve, and the addition ends.

[0067] (22) The control host 1 detects that there is no water flow signal feedback from the water inlet electronic flow sensor, and the control host 1 waits for 2-5 minutes in real time. If there is no water flow signal within the waiting time range, the control host 1 automatically exits the adding process and completes the addition of laundry detergent.

[0068] As a preferred embodiment, both the proportional addition control method and the quantitative addition control method can be used in the process of adding laundry detergent. When the control host 1 receives the signal from the ambient temperature sensor 62 and the ambient temperature is lower than the set 20°C, the control host 1 starts the working power of the electric heating wire to heat the laundry detergent. The laundry detergent has high viscosity and is not easy to flow when the temperature is lower than 20°C. The laundry detergent is heated in the duct to reduce the viscosity of the laundry detergent, improve fluidity, and speed up the addition. When the ambient temperature is higher than the set 20°C, the control host 1 detects that the ambient temperature is changing according to the ambient temperature sensor 62, and the control host 1 controls the speed of the laundry detergent addition pump to change the laundry detergent addition speed, thereby achieving the purpose of controlling the accuracy and speed of laundry detergent addition.

[0069] As a preferred implementation, both the proportional addition control method and the quantitative addition control method can detect the remaining amount of laundry detergent before starting the addition program. If the remaining amount is lower than the set value, the addition program will not be continued and an alarm message will be issued.

[0070] As a preferred embodiment, the system automatically detects whether the laundry detergent in the laundry detergent storage container is above the set lower weight limit when it is turned on. If the laundry detergent weight is lower than the lower weight limit, the system status light flashes and a buzzer sounds, indicating that the installation of the added function is invalid. If the amount of laundry detergent is higher than the lower weight limit, the system status light is always on, and the installation of the added function operates normally.

[0071] This system is equipped with an upper weight limit for adding laundry detergent, which is the maximum weight added during normal laundry. It is mainly to prevent the washing machine from failing in the water level function and unable to stop the water inflow, so as to avoid adding laundry detergent by mistake and causing unnecessary waste.

[0072] The above embodiments are only specific examples for further describing the purpose, technical solutions and beneficial effects of the present invention, and the present invention is not limited thereto. Any modification, equivalent replacement, improvement, etc. made within the scope of the disclosure of the present invention are included in the protection scope of the present invention.

Claims

1. A method for automatically adding laundry detergent, characterized in that: Including proportional addition control method, The proportional addition control method comprises the following steps: (11) First addition: Real-time detection of the washing water flow rate. When the cumulative water flow reaches the set amount of water for the first addition of laundry detergent, the addition of laundry detergent begins. When the weight of the added laundry detergent reaches the set proportion of the first addition, the addition of laundry detergent stops and the step-by-step addition process begins. (12) Step-by-step addition: Real-time detection of the washing water flow rate. When the cumulative water flow reaches the set first step water volume, add laundry detergent. When the weight of the laundry detergent added reaches the proportional weight set for the first step, stop adding laundry detergent. (13) Repeat step (12) until the washing machine finishes washing and stops supplying water, completing the laundry detergent adding procedure.

2. The automatic laundry detergent adding control method according to claim 1, characterized in that: During the process of adding laundry detergent, the ambient temperature is detected. When the ambient temperature is lower than the set temperature of 20°C, the laundry detergent is heated to reduce the viscosity of the laundry detergent and improve its fluidity. At the same time, the laundry detergent adding pump automatically increases the speed to speed up the laundry detergent adding speed. When the ambient temperature is higher than the set temperature of 20°C, the main control unit automatically adjusts the speed of the laundry detergent adding pump according to the changes in the ambient temperature to improve the accuracy of laundry detergent adding.

3. The automatic laundry detergent adding control method according to claim 1, characterized in that: The detergent remaining amount detection program is started immediately when the machine is turned on. The detergent remaining amount information is first detected. If the remaining amount is lower than the set value, the adding program will not be executed and an alarm message will be issued.

4. The automatic laundry detergent adding control method according to any one of claims 1 to 3, characterized in that: After stopping the washing water supply, continue to detect the water inlet signal. When there is no water inlet signal, continue to wait for 2-5 minutes. If there is no water inlet signal within the waiting time range, exit the adding process and issue a 2-second sound message reminder, indicating that the laundry detergent adding procedure is completed.

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