WO2019001289A1

WO2019001289A1 - Detergent consumption control method and washing machine

Info

Publication number: WO2019001289A1
Application number: PCT/CN2018/091387
Authority: WO
Inventors: 郝世龙; 张静静; 李冬; 劳春峰; 许升; 邓金柱
Original assignee: 青岛海尔洗衣机有限公司; 青岛海尔智能技术研发有限公司
Priority date: 2017-06-30
Filing date: 2018-06-15
Publication date: 2019-01-03
Also published as: CN109208234A

Abstract

A detergent consumption control method and a washing machine, comprising: dividing up N concentration intervals according to detergent concentration from low to high, and correspondingly forming N conductivity intervals according to the N concentration intervals; detecting the conductivity of a detergent having an unknown concentration that is deposited in the washing equipment, and recording the detected conductivity as d; determining a conductivity interval where the conductivity d is located; and determining the consumption of the detergent having the unknown concentration by combing the weight of laundry according to the conductivity interval where the conductivity d is located. According to the described method, conductivity is used to reflect the concentration of a detergent, and the consumption of the detergent may be determined by using a look-up table by combing the weight of laundry according to the conductivity interval where the detergent is located, so that not only is the consumption of the detergent accurately controlled, but also controlling the flow is simpler and the execution speed is faster as the concentration of the detergent does not need to be converted according to the conductivity.

Description

Detergent dosage control method and washing machine

相关申请的交叉引用Cross-reference to related applications

This application claims the priority of the Chinese Patent Application filed on June 30, 2017, the Chinese Patent Application No. 201710525485.X, entitled "A Detergent Usage Control Method and Washing Machine", the entire contents of which are incorporated by reference. In this application.

Technical field

The invention belongs to the technical field of washing equipment, and in particular to a method and a washing machine capable of automatically controlling the amount of detergent according to the concentration of the detergent.

Background technique

The washing machine is a special cleaning device for washing clothes, cotton, linen, chemical fiber and other textiles. The current washing machine, whether it is a fully automatic washing machine or a semi-automatic washing machine, basically has the basic functions of washing, rinsing and dehydrating. To a certain extent, it has reduced people's labor intensity and comforted people's lives. Moreover, with the development of society, the gradual improvement of people's quality of life requirements and the continuous improvement of the expectations of smart products, washing machines are also rapidly developing towards the direction of intelligence.

At present, smart washing machines are mainly equipped with automatic detergent delivery or WiFi control. For a washing machine equipped with an automatic detergent delivery function, the amount of the detergent can be automatically determined according to the weight of the laundry, and the corresponding amount of the detergent is put into the automatic dispensing device to realize the automatic delivery function of the detergent.

However, there are many kinds of detergents on the market, such as ordinary detergents with a concentration between 15% and 25%, concentrated detergents with a concentration between 25% and 45%, and a concentration of more than 45%. Concentrated detergents and other types. Different types of detergents have different active contents, and the appropriate amount of detergent required to wash the same weight of laundry is also different. At present, smart washing machines often do not have the automatic detection function of detergent concentration, and only rely on the weight of washing clothes to determine the amount of detergent. This traditional method of controlling the amount of detergent often causes problems such as sparse foaming and unclean laundry when a low-concentration detergent is applied. When a high-concentration detergent is used, detergent residue may occur. Increased foam, the need to increase the number of rinsing, water and electricity and other issues. These can seriously affect the user's laundry experience.

technical problem

The invention solves the problem that the existing washing machine can not reasonably determine the amount of detergent according to the detergent concentration, and proposes a detergent dosage control method, which directly utilizes the conductivity of the detergent to reflect the concentration of the detergent, thereby realizing the detergent dosage. Accurate control.

Technical solution

In one aspect, the present invention provides a detergent dosage control method for use in a washing apparatus, comprising: dividing into N concentration intervals according to a detergent concentration from low to high, and forming N according to the N concentration intervals. Conductivity interval; conducting conductivity detection on the detergent of unknown concentration stored in the washing device, and recording the detected conductivity as d; determining the conductivity interval in which the conductivity d is located; according to the conductivity The conductivity interval in which d is located is combined with the weight of the laundry to determine the amount of detergent of the unknown concentration.

Preferably, in the process of forming N conductivity intervals according to the N concentration intervals, the N concentration intervals are N consecutive concentration intervals, and the critical point concentration values of each concentration interval are recorded as Ci , i=1, . . . , N-1; the conductivity of the N-1 detergents whose concentration values are Ci (i=1, . . . , N-1), respectively, and the detected N-1 conductances The rate value forms the N conductivity intervals as a critical point.

Further, in the process of determining the amount of the detergent of the unknown concentration according to the conductivity interval in which the electrical conductivity d is located in combination with the weight of the laundry, the method comprises: detecting the weight of the laundry in the washing device And searching for a correspondence table of the pre-written washing device according to the conductivity interval where the conductivity d is located and the detected weight of the laundry, the correspondence table is about conductivity, clothing weight, detergent dosage Correspondence relationship table; determining the amount of the detergent of the unknown concentration by the correspondence table.

Preferably, in the correspondence table, the weight of the laundry is divided into M files according to a gear of 2 kg, and the electrical conductivity is divided into N sections to form an amount of M×N detergents.

In another aspect, the present invention also provides a washing machine comprising a detergent box for storing detergent, a conductivity detecting module, an automatic dispensing device, a weight detecting device and a control module; wherein the conductivity detecting module is installed at The detergent box is configured to detect the conductivity of the detergent in the detergent box; the automatic dispensing device is installed on the detergent box for quantitatively extracting and discharging the detergent in the detergent box The weight detecting device is configured to detect the weight of the laundry in the washing machine; the control module receives the conductivity d detected by the conductivity detecting module and the weight of the laundry detected by the weight detecting device, and The conductivity d is compared with the N conductivity intervals of the pre-written control module to determine the conductivity interval in which the conductivity d is located, and then according to the conductivity interval in which the conductivity d is combined The weight of the laundry is determined by the amount of the detergent, and the automatic dispensing device is controlled to perform quantitative extraction.

Preferably, the N conductivity intervals are preferably determined by forming N consecutive concentration intervals from low to high according to the detergent concentration, and recording the critical point concentration values of each concentration interval as Ci, i=1, ......, N-1; the conductivity of the N-1 detergents whose concentration values are Ci (i = 1, ..., N-1), respectively, and the detected N-1 conductivity values as the critical point The N conductivity intervals are determined.

Further, a correspondence table between the conductivity, the weight of the laundry, and the amount of the detergent is stored in the control module; the control module searches according to the conductivity interval in which the conductivity d is located and the weight of the laundry. The control relationship table determines the amount of the detergent.

Preferably, the washing machine divides the weight of the laundry into M gears according to its rated washing capacity according to a gear of 2 kg, the electrical conductivity is divided into N sections, and the detergent dosage forms M×N species, thereby constructing the corresponding correspondence. Relational tables.

The present invention proposes two preferred solutions for when to determine the conductivity of the detergent stored in the detergent box:

For one purpose, the control module activates the conductivity detecting module to detect the conductivity of the detergent stored in the detergent box at the beginning of each washing process. That is, the conductivity detection is performed once before each washing starts.

Secondly, a liquid level detecting module is disposed in the washing machine, and is installed on the detergent box for detecting a liquid level change of the detergent stored in the detergent box, and generating a liquid level detecting signal to be sent to the a control module; when the liquid level of the detergent in the detergent box is detected to rise, the control module starts the conductivity detection module to detect the conductivity d of the detergent stored in the detergent box, and utilizes the The conductivity d replaces the stored conductivity in the control module, and at the beginning of each wash sequence, the amount of detergent is determined using the conductivity d stored in the control module. That is, the conductivity detection is performed only when the detergent is replenished to the detergent box.

Beneficial effect

The invention utilizes the conductivity to reflect the concentration of the detergent, and according to the conductivity interval of the detergent combined with the weight of the laundry, the meter can directly determine the amount of the detergent, and not only achieves accurate control of the amount of detergent, Moreover, since it is not necessary to convert the concentration of the detergent according to the conductivity, the control flow is more concise and the execution speed is faster. Moreover, the washing machine designed by the detergent dosage control method of the invention can directly conduct the conductivity detection of the detergent in the detergent box, and can be corresponding to the accurate conductivity interval without the dilution treatment of the detergent, and then obtain Accurate delivery results can simplify the structural design of the washing machine and increase production efficiency.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a partial structural schematic view of an embodiment of a washing machine provided by the present invention;

Figure 2 is a circuit block diagram showing an embodiment of an electronic control portion of the washing machine of Figure 1;

3 is a control flow chart of an embodiment of the detergent dosage control method proposed by the present invention;

4 is a control flow chart of another embodiment of the detergent dosage control method proposed by the present invention;

Fig. 5 is a correspondence diagram of an embodiment of a correspondence relationship between electrical conductivity, laundry weight, and detergent usage.

Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments.

Embodiments of the invention

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

The concentration of the detergent is reflected by the content of the active substance. At present, there are two main methods for detecting the activation content of the type: optical sensor detection method and chemical reagent detection method. Among them, the optical sensor detection method has high cost and complicated structure. If it is applied to the washing machine, it will not only complicate the hardware structure design of the washing machine, but also significantly increase the cost of the washing machine. The chemical reagent detection method requires off-line detection, consumes reagents, and cannot achieve concentration discrimination on-line, and thus is not suitable for use in a washing machine product.

In order to meet the application requirements of the washing machine, the present embodiment uses the conductivity detection method to directly reflect the concentration of the detergent by detecting the conductivity of the detergent, and then comprehensively determines the amount of the detergent in combination with the weight of the laundry, so that the washing machine can be more precise. The amount of detergent is controlled, and then the washing cleanliness requirements are met, and problems such as detergent residue and increased foam are avoided.

In order to conduct conductivity detection of the detergent, a conductivity detection module is required. The current conductivity detection module has a higher detection accuracy for low-concentration detergents, and a relatively low detection accuracy for high-concentration detergents. In order to meet the requirements of detection accuracy, the conventional solution is to first dilute the detergent to the same extent, by conducting conductivity detection on the diluted detergent, and converting the concentration of the diluted detergent, according to the degree of dilution. Calculate the concentration of the detergent stored in the detergent box. With this conventional solution, it is necessary to add a set amount of the dilution container and the corresponding water inlet pipe and drainage pipe in the washing machine, which not only complicates the structural design of the washing machine, but also the process of detecting and converting the detergent concentration is relatively cumbersome. , causing certain difficulties in the design of software programs.

In order to simplify the software and hardware design of the washing machine, the present embodiment adopts the interval division method, firstly divides N concentration intervals in combination with the concentration range involved in the detergent, and then uses the conductivity detection module to separately detect the conductivity of the detergent in different concentration intervals. Further, N conductive intervals corresponding thereto are formed, and a correspondence table of the detergent usage amount is generated in combination with the conductivity interval and the weight of the laundry, and is written into the computer board of the washing machine before the washing machine leaves the factory. In this way, during the actual use of the washing machine after leaving the factory, the electrical conductivity detecting module can be directly used to detect the conductivity of the detergent stored in the detergent box to determine the conductivity interval into which the electrical conductivity falls, and then according to the conductivity The conductivity interval that falls into the weight combined with the weight of the laundry in the washing machine can be used to check the meter to obtain the exact amount of detergent. The whole process does not need to perform the conversion of conductivity to detergent concentration, which not only speeds up the processing speed of the program, simplifies the software flow design, but also compensates for the lack of detection of the detergent quality caused by the direct detection of the detergent conductivity. The exact problem. Moreover, in the hardware structure design of the washing machine, it is not necessary to add a set amount of the dilution container and the corresponding water inlet pipe and the drain pipe, and only the conductivity detecting module is installed on the detergent box, and the detergent in the detergent box is directly The conductivity detection can be performed, the hardware structure design is simple, and the hardware cost can be effectively controlled.

The hardware structure design of the washing machine of this embodiment will be specifically described below with reference to FIG. 1 and FIG. 2 .

As shown in FIG. 1 and FIG. 2, in order to realize the automatic dispensing function of the detergent, the washing machine of the present embodiment firstly provides a detergent box 2 capable of storing a certain amount of detergent in the washing machine, and is installed on the detergent box 2. The automatic dispensing device 5 is used for quantitative extraction and delivery of the detergent stored in the detergent box 2. The automatic dispensing device 5 can be designed in various ways, such as a venturi negative pressure quantitative extraction method, a quantitative pump automatic extraction method, etc., all of which can ensure an ideal control precision in the amount of delivery. The detergent quantitatively extracted by the automatic dispensing device 5 is discharged to the washing tank 1 or firstly introduced into the water inlet pipe 6 that communicates with the washing tank 1, so that the detergent is first diluted in the water inlet pipe 6 and then injected. Into the washing tank 1, this is more advantageous for the dissolution and dilution of the detergent in the washing machine.

In order to conduct conductivity detection of the detergent in the detergent box 2, the conductivity detecting module 3 is mounted on the detergent box 2 in this embodiment. The conductivity detecting module 3 can be installed under the top, the bottom or the side wall of the detergent box 2, as long as the detecting electrode can protrude into the bottom of the detergent box 2, even if the detergent is left, it can be accurate. Conduct conductivity detection.

A liquid level detecting module 4 for detecting the remaining amount of the detergent stored in the detergent box 2 may be further mounted on the detergent box 2. By performing liquid level detection on the detergent in the detergent box 2, on the one hand, the user can be promptly reminded to replenish the detergent box 2 when the detergent is about to be used up; on the other hand, the level of the detergent can be When it is raised, it is automatically recognized that a new detergent is injected into the detergent box 2. At this time, the conductivity detecting module 3 can be activated to perform conductivity detection on the newly injected detergent to re-determine the conductivity interval, thereby achieving accurate control of the amount of the added detergent.

Further, in the present embodiment, the washing tank 1 is further provided with a weight detecting module 7 for detecting the weight m of the laundry to be placed in the washing machine. A control module 8 is further disposed on the computer board of the washing machine, as shown in FIG. 2, receiving the conductivity d output by the conductivity detecting module 3, the liquid level detecting signal output by the liquid level detecting module 4, and the washing clothes output by the weight detecting module 7. The weight m is determined and the amount of detergent v is determined and sent to the automatic dispensing device 5 to effect metered delivery of the detergent.

The method for controlling the amount of detergent executed by the washing machine will be specifically described below in conjunction with the hardware structure shown in FIGS. 1 and 2.

The detergent dosage control method of the present embodiment is preferably implemented by the following two design schemes.

The first design is shown in Figure 3 and includes the following steps:

S301. The washing machine is powered on and initialized, waiting for the user to select a desired running program.

S302. The washing machine performs the subsequent steps each time the washing program is run.

S303, detecting the conductivity d of the detergent;

In the present embodiment, the control module 8 on the washing machine computer board first activates the conductivity detecting module 3 to detect the conductivity d of the detergent stored in the detergent box 2 each time the washing machine is detected to enter the washing program. That is, the conductivity detection process of the present scheme is performed once at the beginning of each washing process.

S304. Determine, according to the detected conductivity d, a conductivity interval in which the conductivity d is located;

In the development stage of the washing machine, the first embodiment divides N concentration intervals for the concentration ranges involved in different types of detergents, and then forms N conductivity intervals according to the N concentration intervals, and uses the conductivity interval to reflect Concentration interval for determination of subsequent detergent usage.

Specifically, N consecutive concentration intervals can be formed according to the detergent concentration from low to high, and the critical point concentration values of the respective concentration intervals are recorded as Ci, i=1, . . . , N-1; for example, C1= 15%, C2=25%, C3=35%, C4=45%, thus forming five consecutive concentration intervals, respectively: <15%, 15%~25%, 25%~35%, 35 %~45%, >45%. Then, using the conductivity detecting module 3 selected on the washing machine, the conductivity of the N-1 detergents having the concentration values Ci (i = 1, ..., N-1) respectively is detected; for example, the concentration values are respectively C1 The detergents with =15%, C2=25%, C3=35%, and C4=45% have the detected conductivity: d1=40ms/cm, d2=22ms/cm, d3=13ms/cm, d4 = 6ms/cm. In this way, the detected N-1 conductivity values di can be used as a critical point to form N conductivity intervals corresponding to the N concentration intervals; for example, 5 conductivity can be determined by combining d1-d4. The intervals are: >40ms/cm, 40ms/cm~22ms/cm, 22ms/cm~13ms/cm, 13ms/cm~6ms/cm, <6ms/cm, and the five conductivity intervals are just as described above. The five concentration intervals correspond one-to-one. Thereby, the conductivity interval can be used to indirectly reflect the concentration of the detergent.

Since the amount of detergent required for washing clothes of different weights is also different, the determination of the amount of detergent should be comprehensively determined in consideration of both the detergent concentration and the laundry weight. For the current washing machine, the washing capacity of different types of washing machines is not the same, and the weight of the laundry can be divided into M files according to the rated washing capacity of the washing machine. The M gears may be determined by means of equalizing the rated washing capacity, or may be divided into M gears by using 1 kg. For example, for an 8 kg washing machine, it can be divided into 4 files of 0~2 kg, 2~4 kg, 4~6 kg, 6~8 kg; for a 7 kg washing machine, it can be divided into 0~2 For kilograms, 2 to 4 kilograms, 4 to 6 kilograms, and 6 to 7 kilograms, for 6 kilograms, it can be divided into 3 to 2 kilograms, 2 to 4 kilograms, and 4 to 6 kilograms. And so on. When the weight m of the laundry to be put into the washing machine exceeds the rated washing capacity of the washing machine, it can be divided into the highest grade for processing.

The conductivity interval of the detergent is used to reflect the concentration interval, and according to the determined N conductivity intervals and the M clothing weight positions, a correspondence table between the conductivity, the weight of the clothes, and the amount of the detergent is formed, as shown in FIG. It can be determined that the amount of detergent in the correspondence table can be determined experimentally. The resulting correspondence table is written to the control module 8 so that the washing machine is called during actual use.

In the correspondence table shown in FIG. 5, the conductivity interval is divided into five, respectively > 40 ms / cm, 40 Ms/cm~22ms/cm, 22ms/cm~13ms/cm, 13ms/cm~6ms/cm, <6ms/cm; clothing weight is divided into 4 files, respectively 0~2kg, 2~4kg, 4~ 6 kg, 6 ~ 8 kg; thus can correspond to 20 detergent dosage v. The unit of detergent amount v shown in Figure 5 is in milliliters.

S305, detecting the weight m of the laundry;

In the present embodiment, the weight m of the laundry laundry put into the washing machine can be detected by the weight detecting module 7 and transmitted to the control module 8 to determine the gear position in which the weight m of the laundry is in the correspondence table.

S306, combining the conductivity interval in which the conductivity d is located and the weight m of the laundry, finding a correspondence table, and determining the amount of detergent v;

In this embodiment, the control module 8 searches for the stored correspondence table according to the conductivity interval in which the conductivity d is located and the gear position in which the weight m of the laundry is located, and obtains the corresponding washing from the corresponding relationship table. Dosage amount v.

S307, controlling the automatic dispensing device 5 to quantitatively dispense the detergent according to the amount of the detergent v;

In the embodiment, the control module 8 controls the automatic dispensing device 5 to extract the detergent having the capacity v from the detergent box 2 according to the obtained detergent dosage v, and puts it into the washing tank 1 or the water inlet pipe 6. In order to achieve the quantitative delivery of detergent.

S308, enter a normal washing procedure.

In the first design, the liquid level detecting module 4 can only be used to detect the remaining amount of detergent in the detergent box 2, and send it to the control module 8 for comparison with a preset lower limit value. When the remaining amount of the detergent is lower than the set lower limit value, the control module 8 may prompt the user to replenish the detergent box 2 with the sound/light alarm or by displaying the prompt information through the human machine interface 9.

The second design scheme is shown in Figure 4 and includes the following steps:

S401, the washing machine is powered on and initialized.

S402. The startup liquid level detecting module 4 detects the liquid level of the detergent;

In the embodiment, the liquid level detecting module 4 periodically detects the liquid level of the detergent stored in the detergent box 2, and generates a liquid level detecting signal to be sent to the control module 8 for storage. The control module 8 compares each received detergent level with the previously stored liquid level parameter, and if not, updates; if the received detergent level is compared with the previously saved liquid level parameter A significant increase is made, and it is determined that the detergent box 2 is replenished with a new detergent.

S403. If the liquid level of the detergent is raised, the subsequent steps are performed; otherwise, the process proceeds to step S406 to continue the execution.

S404, detecting the conductivity d of the detergent;

In the present embodiment, the control module 8 on the washing machine computer board activates the conductivity detecting module 3 to detect the conductance of the detergent stored in the detergent box 2 after each time the new detergent is added to the detergent box 2. Rate d. That is, the conductivity detection process of the present scheme is performed only once when the detergent is refreshed.

S405, determining a conductivity interval in which the conductivity d is located according to the detected conductivity d, and saving;

For the specific determination process of the conductivity interval in which the electrical conductivity d is located, reference may be made to the related description in the above step S304, and the description will not be further described herein. The conductivity interval in which the conductivity d is located is stored in the control module 8 for the washing machine to call in the washing program.

S406. Wait for the user to select a desired running program.

S407. If the user chooses to run the washing program, perform the subsequent steps; otherwise, jump to other running programs to respond to the user operation.

S408. Read a conductivity interval corresponding to the current detergent.

The conductivity interval in which the conductivity d of the current detergent is located has been stored in the control module 8 and can be directly retrieved for use.

S409, detecting the weight m of the laundry;

The present embodiment can use the weight detecting module 7 to detect the weight m of the laundry to be put into the washing machine, and transmit it to the control module 8 to determine the gear position in which the weight m of the current laundry is in the correspondence table.

S410, combining the conductivity interval of the current detergent's conductivity d and the weight m of the laundry, finding a correspondence table, determining the amount of detergent v;

That is, according to the electrical conductivity interval in which the electrical conductivity d is located and the gear position in which the weight m of the laundry is located, the detergent amount v corresponding thereto is found from the correspondence table.

S411, controlling the automatic dispensing device 5 to dispense the detergent according to the amount of the detergent v;

That is, the control module 8 controls the automatic dispensing device 5 to extract the detergent having the capacity v from the detergent box 2 according to the obtained detergent dosage v, and put it into the washing tank 1 or the water inlet pipe 6 to realize the detergent. Quantitative delivery.

S412, entering a normal washing procedure.

In the second design, the liquid level detecting module 4 detects the liquid level change of the detergent in the detergent box 2 in real time and sends it to the control module 8 for storage. The control module 8 can judge the remaining amount of the detergent according to the received detergent liquid level, and control the sound/light alarm to perform the sound/light alarm when the remaining amount of the detergent is lower than the preset lower limit value. Or displaying a prompt message through the man-machine interface 9 to remind the user to promptly replenish the detergent box 2; on the other hand, when the detergent liquid level is detected to rise, it is automatically determined that there is a new one in the detergent box 2 Detergent injection. Since the concentration of the newly injected detergent is unknown, it is necessary to activate the conductivity detecting module 3 to perform conductivity detection on the detergent in the detergent box 2 to modify the conductivity of the current detergent stored in the control module 8. Interval, which makes it easy to call directly in the washing program.

The invention combines the electrical conductivity of the detergent and the weight of the laundry to determine the amount of the detergent by using the look-up table method, the scheme is simple, the implementability is strong, and the precise delivery of the detergent is realized. Of course, the detergent dosage control method of the present invention can also be applied to other washing apparatuses other than the washing machine, and the same or similar technical effects can be obtained as well.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the foregoing embodiments are modified, or the equivalents of the technical features are replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A detergent dosage control method for use in a washing apparatus, characterized in that

Dividing into N concentration intervals according to the detergent concentration from low to high, and forming N conductivity intervals according to the N concentration intervals;

Conducting conductivity detection on an unknown concentration of detergent stored in the washing device, and recording the detected conductivity as d;

Determining a conductivity interval in which the conductivity d is located;

The amount of the detergent of the unknown concentration is determined based on the conductivity interval in which the conductivity d is located in combination with the weight of the laundry.
The detergent dosage control method according to claim 1, wherein in the process of forming N conductivity intervals according to the N concentration intervals, the method comprises:

The N concentration intervals are N consecutive concentration intervals, and the critical point concentration values of each concentration interval are recorded as Ci, i=1, . . . , N-1;

Detecting the conductivity of the N-1 kinds of detergents whose concentration values are Ci (i=1, . . . , N-1) respectively, and forming the N conductances by using the detected N-1 conductivity values as critical points. Rate range.
The detergent dosage control method according to claim 1 or 2, wherein the amount of the detergent of the unknown concentration is determined based on a conductivity interval in which the electrical conductivity d is located in combination with the weight of the laundry. In the process, including:

Detecting the weight of the laundry in the washing device;

Searching, according to the conductivity interval where the conductivity d is located and the detected weight of the laundry, a correspondence table of the pre-written washing device, wherein the correspondence table is about the conductivity, the weight of the laundry, and the amount of the detergent. Correspondence table

The amount of the detergent of the unknown concentration is determined by the correspondence table.
The detergent dosage control method according to claim 3, wherein in the correspondence table, the weight of the laundry is divided into M files according to a gear of 2 kg, and the electric conductivity is divided into N sections to form M×N species. The amount of detergent used.
A washing machine, comprising:

a detergent box for storing detergent;

a conductivity detecting module mounted on the detergent box for detecting conductivity of the detergent in the detergent box;

An automatic dispensing device installed on the detergent box for quantitatively extracting and discharging the detergent in the detergent box;

a weight detecting device for detecting the weight of the laundry in the washing machine;

a control module that receives the conductivity d detected by the conductivity detecting module and the weight of the laundry detected by the weight detecting device, and writes the conductivity d with N conductivity intervals previously written into the control module Comparing to determine the conductivity interval in which the conductivity d is located, and determining the amount of the detergent according to the conductivity interval in which the conductivity d is located in combination with the weight of the laundry, and controlling The automatic dispensing device performs quantitative extraction and delivery.
The washing machine according to claim 5, wherein said N conductivity intervals are determined by:

N consecutive concentration intervals are formed according to the detergent concentration from low to high, and the critical point concentration values of each concentration interval are recorded as Ci, i=1, . . . , N-1;

The conductivity of the N-1 kinds of detergents whose concentration values are Ci (i=1, . . . , N-1) are respectively detected, and the N values of the detected N-1 conductivity values are used as critical points to determine the N pieces. Conductivity interval.
The washing machine according to claim 5, wherein a correspondence table between the conductivity, the weight of the laundry, and the amount of the detergent is stored in the control module; the control module is located according to the conductivity d The conductivity interval and the weight of the laundry are searched for the comparison table to determine the amount of the detergent.
The washing machine according to claim 7, wherein the washing machine divides the weight of the laundry into M gears according to its rated washing capacity, and divides the weight of the clothes into M gears according to the gear of 2 kg, and the electric conductivity is divided into N sections, and the amount of detergent forms M×N. To construct the corresponding relationship table.
The washing machine according to any one of claims 5 to 8, wherein the control module activates the conductivity detecting module to detect the detergent stored in the detergent box at the beginning of each washing process Conductivity.
The washing machine according to any one of claims 5 to 8, characterized in that the washing machine is further provided with a liquid level detecting module mounted on the detergent box for detecting the storage in the detergent box. Level change of the detergent, and generating a liquid level detection signal is sent to the control module;

The control module activates the conductivity detecting module to detect the conductivity d of the detergent stored in the detergent box when the liquid level of the detergent in the detergent box is detected to rise, and utilizes the conductivity d replaces the stored conductivity in the control module, and at the beginning of each washing procedure, the amount of detergent is determined using the conductivity d stored in the control module.