CN114795047A

CN114795047A - Dish washing machine washing control method and dish washing machine

Info

Publication number: CN114795047A
Application number: CN202210603652.9A
Authority: CN
Inventors: 汉露
Original assignee: Shenzhen Yimu Technology Co ltd
Current assignee: Shenzhen Yimu Technology Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-07-29

Abstract

The invention discloses a washing control method of a dish washing machine and the dish washing machine, the method comprises the following steps: acquiring an initial TOC value and an initial TDS value of tap water at a water inlet end; carrying out first prewashing to obtain a first TOC value and a first TDS value; carrying out second prewashing to obtain a second TOC value and a second TDS value; calculating the oil content in the tableware, the salt content in the tableware and the residual oil content and salt content of water in a circulating water path of the dish washing machine after two pre-washing according to the obtained numerical values; further judging the oil and salt containing state of the tableware; and executing a corresponding washing process according to the judgment result. The invention can execute the corresponding washing process according to the judgment result through grading judgment of the oil and salt content combination in the working process of the dish-washing machine, automatically adjust the washing parameters and further realize the intelligent washing of the tableware.

Description

Dish washing machine washing control method and dish washing machine

Technical Field

The invention relates to the technical field of dish washing machines, in particular to a washing control method of a dish washing machine, which can judge a washing mode according to the contents of grease organic matters and salt in tableware.

Background

The prior art mainly detects the content of substances in the dishwasher aiming at TDS turbidity index to judge whether the dishwasher is clean or not, namely, the dishwasher is judged whether to be cleaned or not by detecting turbidity data in water, however, a large amount of experimental data proves that the judgment is obviously not enough by only using turbidity. The application number CN202111559642.1 is named as a washing method of a dish washing machine and the dish washing machine, and a water quality sensor is used for detecting a K value in water to judge whether a detergent is sufficient or not and whether a bowl is cleaned or not; the application number CN201810869090.6 is named as a cleaning system and a control method thereof, the water quality detection device comprises one or a combination of a plurality of detection units of a TDS detection unit, a water temperature detection unit, a TOC detection unit, a turbidity detection unit and a detergent residue detection unit, and the whole washing process is adjusted according to water quality detection data.

In the prior art, the water quality detection device can reflect the water quality information in the washing chamber, but how to detect grease organic matters and salt of the dishwasher and judge the washing is not described.

Disclosure of Invention

The technical purpose is as follows: aiming at the technical problem, the invention provides a washing control method of a dish washing machine, which comprises the steps of carrying out grading judgment on the oil and salt content combination in the working process of the dish washing machine, executing a corresponding washing process according to a judgment result, and automatically adjusting washing parameters if an analysis result is not normal oil and normal salt, thereby realizing intelligent washing of tableware.

The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:

a washing control method of a dishwasher, comprising the steps of:

(1) acquiring an initial TOC value and an initial TDS value of tap water at a water inlet end;

(2) carrying out first prewashing, recording a plateau period, acquiring a TOC value and a TDS value of water in a circulating water path of the dishwasher, calculating an average value of the plateau period, and respectively recording the average value as a first TOC value and a first TDS value;

(3) carrying out second prewashing, recording a plateau period, acquiring a TOC value and a TDS value of water in a circulating water channel of the dishwasher, and calculating average values of the plateau period, wherein the average values are respectively recorded as a second TOC value and a second TDS value;

(4) calculating the difference value between the first TOC value and the initial TOC value, and using the difference value to represent the oil content in the tableware; calculating the difference value of the second TOC value and the initial TOC value, and using the difference value to represent the residual oil content of water in the circulating water path of the dishwasher after two times of prewashing;

calculating a difference between the first TDS value and the initial TDS to indicate the salt content of the dishware; calculating the difference value between the second TDS value and the initial TDS value, wherein the difference value is used for representing the salt-containing residual quantity of water in the circulating water path of the dishwasher after two times of prewashing;

(5) judging whether the tableware belongs to a low oil state, a normal oil state or a high oil state according to the calculated residual oil content; judging whether the tableware belongs to a low salt state, a normal salt state or a high salt state according to the calculated salt-containing residual quantity;

(6) and (5) executing a corresponding washing process according to the judgment result of the step (5).

Preferably, the step (5) specifically includes:

if the difference value of the second TOC value and the initial TOC is lower than a first oil-containing set value T1, judging the oil-containing state to be a low oil state;

if the difference value between the second TOC value and the initial TOC is between the first oil-containing set value T1 and the second oil-containing set value T2, and the difference value contains T1 and T2 values, judging the oil state to be normal;

if the difference value of the second TOC value and the initial TOC is higher than a second oil-containing set value T2, judging the oil-containing state to be a high oil state;

if the difference value between the second TDS value and the initial TDS is lower than the first salt-containing set value J1, judging the state is a low salt state;

if the difference between the second TDS value and the initial TDS is between the first salinity setting J1 and the second salinity setting J2, containing J1 and J2 values, then judging as a normal salinity state;

and if the difference value between the second TDS value and the initial TDS is higher than the second salt-containing set value J2, judging the high salt state.

Preferably, if the judgment result of the step (5) is normal oil and normal salt, the step (6) executes a preset standard washing process, otherwise, executes a corresponding washing process after adjusting the washing parameters, wherein the washing parameters include but are not limited to the addition amount of detergent, water temperature, rinsing times and main washing water amount.

Preferably, in the step (6), the method of determining the amount of the detergent to be added based on the determination result in the step (5) is as follows:

the dosage of the detergent corresponding to the normal oil state is a standard amount;

on the basis of the standard amount of the high-oil state, detergent is added, the increment of the detergent is in direct proportion to the residual amount of oil, and the upper limit value is 2 times of the standard amount;

the detergent is reduced on the basis of the standard amount of the low-oil state, the reduction amount of the detergent is in direct proportion to the residual oil content, and the lower limit value is 1/2 of the standard amount of the detergent.

Preferably, in the step (6), the method for determining the water temperature according to the judgment result of the step (5) is as follows:

normal oil and low oil states, and the corresponding water temperature is normal temperature;

in a high oil state, the corresponding water temperature is higher than normal temperature water.

Preferably, in the step (6), the number of rinses is determined according to the judgment result of the step (5) as follows:

the high salt state and the high oil state are both added with one or more times of rinsing on the basis of main washing;

the high salt state improves the water consumption of the main washing process, and the low salt state reduces the water consumption of the main washing process.

A dishwasher, characterized by: the dishwasher control system comprises a TOC sensor, a TDS sensor, a data processing and analyzing module and an executing module, wherein the TOC sensor is used for detecting a TOC value of water in the working process of the dishwasher, and the TDS sensor is used for detecting a TDS value of the water in the working process of the dishwasher; the execution module executes a corresponding washing process according to the processing result of the data processing and analyzing module; wherein the data processing and analyzing module executes the following steps:

acquiring an initial TOC value and an initial TDS value of tap water at a water inlet end;

carrying out first prewashing, recording a plateau period, acquiring a TOC value and a TDS value of water in a circulating water channel of the dishwasher, and calculating average values of the plateau period, wherein the average values are respectively recorded as a first TOC value and a first TDS value;

carrying out second prewashing, recording a plateau period, acquiring a TOC value and a TDS value of water in a circulating water channel of the dishwasher, and calculating average values of the plateau period, wherein the average values are respectively recorded as a second TOC value and a second TDS value;

calculating the difference between the first TOC value and the initial TOC value, wherein the difference is used for representing the oil content in the tableware; calculating the difference value of the second TOC value and the initial TOC value, and using the difference value to represent the residual oil content of water in the circulating water path of the dishwasher after two times of prewashing;

calculating a difference between the first TDS value and the initial TDS to indicate the salt content of the dishware; calculating a difference value between the second TDS value and the initial TDS value, wherein the difference value is used for representing the salt-containing residual quantity of water in the circulating water path of the dishwasher after two times of prewashing;

judging whether the tableware is in a low oil state, a normal oil state or a high oil state according to the calculated residual oil content; and judging whether the tableware belongs to a low salt state, a normal salt state or a high salt state according to the calculated salt-containing residual quantity.

Preferably, the dishwasher further comprises a washing parameter adjusting module;

if the data processing and analyzing module judges that the tableware belongs to normal oil and normal salt, the execution module executes a preset standard washing process;

otherwise, the cleaning parameter adjusting module adjusts the cleaning parameters according to the analysis result of the data processing and analyzing module, and the execution module executes the washing process after the cleaning parameters are adjusted.

Has the advantages that: due to the adoption of the technical scheme, the invention has the following beneficial effects:

the washing control method of the dish washer provided by the invention has the advantages that the oil content and the salt content in the water in the washing process of the dish washer are directly detected, the combination of the oil content and the salt content in the water in the working process of the dish washer is judged in a grading way, the washing process corresponding to the grading is executed, if the analysis result is not normal oil normal salt, the washing parameters can be automatically adjusted, a better washing effect is achieved on the premise of saving water and energy, the intelligent washing of tableware is further realized, and the dietary suggestion can be provided for a user according to the oil content and the salt content in the tableware.

Drawings

FIG. 1 is a table of oil salt content classifications;

FIG. 2 is a schematic diagram of the control logic for the amount of detergent added;

FIG. 3 is a schematic diagram of the control logic for water temperature;

FIG. 4 is a chart of TOC and TDS data acquisition of tableware stained with 6 kinds of oil, salt and organic matters in the first prewashing process;

FIG. 5 is a chart of TOC and TDS data acquisition of tableware stained with 6 kinds of oil, salt and organic matters in the second pre-washing process.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the accompanying drawings.

Example one

The embodiment provides a dishwasher, wherein a plurality of sensors are arranged in a circulating water path of the dishwasher, and comprise a TOC sensor, a TDS sensor, a data processing and analyzing device, an executing device and a diet advising device, the TOC sensor is used for detecting a TOC value of water in the working process of the dishwasher, and the TOC (Total Organic Carbon) represents the content of Organic matters in the water and corresponds to the content of grease; the TDS sensor is used for detecting TDS or conductivity value of the water in the working process of the dishwasher, and the conductivity value can be obtained by calculation according to the TDS value. TDS (total dissolved solids) characterizes the amount of total dissolved solids in water, corresponding to the amount of salt.

Example two

This example provides a washing method of a dishwasher according to the first example, which includes a standard washing program including two pre-washes, a main wash and two rinses.

1. The specific washing control method is as follows:

when the dishwasher starts to work, a tap water inlet sensor detects and acquires TOC and TDS/conductivity values of tap water, which are recorded as TOC0 and TDS 0.

During the first prewash phase, the TOC and TDS/conductivity values for the plateau were recorded and the average values for the plateau were taken as TOC1 and TDS 1.

During the second prewash phase, the TOC and TDS/conductivity values for the plateau were recorded and the average of the plateau was taken as TOC2 and TDS 2.

For the first pre-wash, the detected TOC1 is the oil content in the water, thus (TOC1-TOC0) represents the oil content in the dish and the detected TDS1 is the salt content in the water, thus (TDS1-TDS0) represents the salt content in the dish, and during the whole washing process, the TOC and TDS values are recorded and the diet advice of oil and salt can be provided for the user of the dishwasher.

And in the second prewashing, the detected TOC2 is the grease content of the water in the second prewashing process, so that (TOC2-TOC0) represents the residual amount of the oil in the water after the two prewashing processes, and the detected TDS2 is the salt content of the water in the second prewashing process, so that (TDS2-TDS0) represents the residual amount of the salt in the water after the two prewashing processes and is used for guiding the subsequent washing process of the dishwasher.

The data processing and analyzing device processes and analyzes, and if (TOC2-TOC0) is lower than a set value T1, the oil is judged to be in a low oil state; if (TOC2-TOC0) is between T1 and T2 (containing T1 and T2 values), judging the oil state to be normal; if (TOC2-TOC0) is higher than T2, it is judged to be in a high oil state. If (TDS2-TDS0) is lower than the set value J1, judging that the salt is in a low salt state; if (TDS2-TDS0) is between J1 and J2 (containing J1 and J2 values), judging as a normal salt state; if (TDS2-TDS0) is higher than J2, it is judged to be in a high salt state.

According to different oil salt states, corresponding washing processes are executed, and as shown in fig. 1, an execution device executes washing processes corresponding to oil salt grading: if the analysis of (TOC2-TOC0) and (TDS2-TDS0) results in normal oil normal salts (5), then a standard wash procedure is followed. If the analysis results of (TOC2-TOC0) and (TDS2-TDS0) are not normal oil normal salt (1-4, 6-9), better washing effect is achieved under the conditions of water saving and electricity saving by adjusting the washing parameters. Adjustable cleaning parameters include, but are not limited to, detergent add-on, water temperature, number of rinses, main wash water volume, and the like.

2. In the performing step, the method of determining the amount of detergent addition is as follows:

normal oil (corresponding to

boxes

4, 5, 6 in figure 1) was added with a standard amount of detergent.

High oil (corresponding to

boxes

1, 2, 3 in fig. 1) on the basis of the standard washing procedure, more detergent is added, the amount of detergent increases with (TOC2-TOC0), and the upper limit value is 2 times the standard amount of detergent. The amount of detergent added can be calculated as shown in FIG. 2:

if T2< (TOC2-TOC0) < 2X T2, adding detergent in the amount of (TOC2-TOC 0)/T2X standard amount of detergent;

if (TOC2-TOC0) ≥ 2T 2, the detergent amount is 2 standard detergent.

The low oil condition (corresponding to

boxes

7, 8, 9 in fig. 1) is based on the standard wash procedure, with less detergent added, the amount of detergent decreasing with (TOC2-TOC0), the lower limit being 1/2 the standard amount of detergent. The amount of detergent added can be calculated as shown in FIG. 2:

if (TOC2-TOC0) is less than or equal to 0.5T 1, the detergent is added in an amount of 0.5 standard detergent.

If 0.5T 1< (TOC2-TOC0) < T1, the addition amount of the detergent is (TOC2-TOC0)/T1 standard amount of the detergent.

After the addition amount of the detergent is calculated and determined, the addition amount of the detergent is automatically controlled by controlling the liquid adding pump.

In the performing step, the water temperature is determined by the following method:

normal oil and low oil states (corresponding to boxes 4-9 in fig. 1) adopt a standard main washing process, and normal-temperature water washing is adopted;

the high oil condition (corresponding to boxes 1-3 in fig. 1) increases the water temperature of the main wash process, e.g. water can be set up to 70 ℃. The main wash water temperature may be calculated as shown in fig. 3:

if (TOC2-TOC0) > 2T 2, the temperature of the main washing water is 70 ℃.

If T2< (TOC2-TOC0) ≦ 2 × T2, the temperature of the main washing water is [ (TOC2-TOC0)/T2-1 ]. times 45 ℃ +25 ℃.

In the performing step, the number of rinsing times is determined as follows:

both the high salt and high oil regimes (corresponding to blocks 1-3, 6, 9 in figure 1) are rinsed one or more times after the main wash.

Main washing water amount: the high salt state (corresponding to

boxes

3, 6, 9 in fig. 1) increases the water usage during the main wash phase.

The low salt state (corresponding to

blocks

1, 4, 7 in fig. 1) reduces the water usage during the main wash phase.

3. The following formula is that J1 is 100ppm, J2 is 300 ppm; t1-10 ppm, T2-20 ppm are examples.

As shown in FIG. 4, various amounts of salt, salad oil, soy sauce, etc. are added to dishes, the dishwasher is operated to perform a first pre-washing program, TOC and TDS values are continuously recorded in the first pre-washing process, a graph is drawn by taking time (seconds) as a horizontal axis and TOC and TDS values as a vertical axis, it can be seen that TOC and TDS are relatively stable after the pre-washing starts for 300s, a plateau is reached, TOC and TDS data within the range of 300 th and 400 th seconds of the first pre-washing recording plateau period are taken, and an average value of the plateau period is calculated.

The TDS data in FIG. 4 shows that the TDS contents of the first pre-washing of the tableware with 6 kinds of oil, salt and organic matters are respectively '20 g of salt', '10 g of salt', '5 g of salt and 5mL of salad oil' in the sequence from high to low in the plateau period, and the contents of the '10 mL soy sauce', '5 mL of soy sauce and 5mL of salad oil' and '10 mL of salad oil';

in the TOC data chart of FIG. 4, the TOC contents of the first pre-washing of tableware stained with 6 kinds of oil, salt and organic substances in the plateau period are respectively "10 mL of soy sauce" (about 75 ppm), "5 mL of soy sauce 5mL of salad oil" (about 60 ppm), "10 mL of salad oil" and "5 g of salt 5mL of salad oil", and the lowest TOC content is "20 g of salt" and "10 g of salt", which are similar to each other.

As shown in fig. 5, after the first prewashing is finished, the same amount of tap water is added, the TOC and TDS values are continuously recorded in the second prewashing process, the time (seconds) is taken as the horizontal axis, the TOC and TDS values are plotted as the vertical axis, the TOC and TDS values are stable after 970s of prewashing starts, the TOC and TDS values reach the platform, the TOC and TDS data in the range of 970s to 1070s of the second prewashing recording platform period are taken, and the average value of the platform period is calculated.

The TDS data chart in fig. 5 shows that after the first pre-wash discharge, the TDS content of the 6 kinds of oily-saline organic substance stained tableware is significantly reduced in the plateau phase by the second pre-wash, three groups of TDS of "20 g salt", "10 g salt" and "5 g salt 5mL salad oil" added with salt are significantly reduced, the TDS content of "20 g salt" is reduced to about 1000ppm, and the TDS content of "10 g salt" and "5 g salt 5mL salad oil" is reduced to within 500ppm, which indicates that most of the salt is dissolved and discharged in the first pre-wash process, and the high salt state requires the second pre-wash; because the salt components in the soy sauce with low salt content are basically and completely discharged after the first pre-washing, the TDS data of three groups of '10 mL soy sauce', '5 mL soy sauce 5mL salad oil' and '10 mL salad oil' are similar.

In the TOC data chart in fig. 5, after the first pre-washing, the TOC content of the tableware stained with 6 kinds of oil and salt organic matters in the second pre-washing in the plateau period, the TOC content of "10 mL soy sauce" is significantly reduced to about 15ppm, the TOC content of "5 mL soy sauce 5mL salad oil" is reduced to about 30ppm, the TOC content of "10 mL salad oil" is also reduced to about 30ppm, and the TOC content of "20 g salt" and "10 g salt" is maintained at about 0ppm without change.

Adding different amounts of salt, salad oil, soy sauce and the like into dishes, running a two-wheel prewashing program of a dishwasher, continuously recording TOC and TDS values in the prewashing process, and plotting the time (seconds) as a horizontal axis and the TOC and TDS values as a vertical axis, wherein the TOC and TDS values are stable after 300s of prewashing is started, reaching a platform, taking TOC and TDS data in the range of 300 and 400s of each prewashing, calculating average values of TOC1 and TDS1 of the platform period, and subtracting TOC0 and TDS0 of tap water measured before prewashing to 172ppm to obtain the TOC and TDS values of the two-wheel prewashing for each test, (TOC1-TOC0) and TDS1-TDS 0).

Table 1 shows the TOC and TDS values and the determination state table of the tableware with 6 kinds of oil and salt stains in the pre-washing process. The first prewash values in the column are (TOC1-TOC0) and (TDS1-TDS0), and the second prewash values are (TOC2-TOC0) and (TDS2-TDS 0). All values below 0 are adjusted to 0.

TABLE 16 table of TOC and TDS values and determination state of tableware with oil and salt stains in prewashing process

From the TOC and TDS values of the second pre-wash run, i.e. the residual oil content (TOC2-TOC0) and the residual salt content (TDS2-TDS0) values, compared to the first salt content setting J1, the second salt content setting J2, the first oil content setting T1, and the second oil content setting T2, it is found that the wash status judged by the dishwasher under each condition, e.g. 10g salt and 20g salt correspond to state 9 (low oil high salt), 10mL soy sauce and 5mL soy sauce 5mL salad oil correspond to state 4 (normal oil low salt), 10mL salad oil correspond to state 1 (high oil low salt), 5g salt 5mL salad oil correspond to 5 (normal oil normal salt).

10g of salt and 20g of salt correspond to state 9 (low oil high salt), less detergent is added during the subsequent washing, the amount of detergent decreases with (TOC2-TOC0), the lower limit being 2 times the standard amount of detergent; washing with normal temperature water; the water consumption in the main washing stage is increased; the rinsing is added once more after the main washing. The detergent addition was calculated as 10g of salt, and was 0.5 standard detergent since (TOC2-TOC0) 1ppm < 0.5T 1 to 5 ppm.

10mL soy sauce and 5mL soy sauce 5mL salad oil correspond to State 4 (Normal oil Low salt), add standard amount of detergent; washing with normal temperature water; the water consumption in the main washing stage is reduced.

10mL of salad oil corresponds to State 1 (high oil, low salt), more detergent is added on the basis of the standard wash procedure, the amount of detergent increases with (TOC2-TOC0), but there is an upper limit of 1/2 of the standard amount of detergent; the water temperature in the main washing process is improved; the water consumption in the main washing stage is reduced. The amount of detergent added was calculated, and since (TOC2-TOC0) 27ppm <2 × T2 ═ 40ppm, the amount of detergent added was (TOC2-TOC0)/T2 × standard detergent 1.35 × standard detergent. The water temperature in the main wash was calculated as (TOC2-TOC0) ═ 27ppm <2 × T2 ═ 40ppm, and [ (TOC2-TOC0)/T2-1] × 45 ℃ +25 ℃ + 41 ℃.

5g salt 5mL salad oil corresponds to 5 (normal oil normal salt) and standard wash procedures are followed.

EXAMPLE III

The embodiment provides a dishwasher, which comprises a TOC sensor, a TDS sensor, a data processing and analyzing module and an executing module, wherein the TOC sensor is used for detecting a TOC value of water in the working process of the dishwasher, and the TDS sensor is used for detecting a TDS value of the water in the working process of the dishwasher; the execution module executes a corresponding washing process according to the processing result of the data processing and analyzing module; wherein the data processing and analyzing module executes the following steps:

calculating the difference between the first TDS value and the initial TDS to indicate the salt content of the dishware; calculating the difference value between the second TDS value and the initial TDS value, wherein the difference value is used for representing the salt-containing residual quantity of water in the circulating water path of the dishwasher after two times of prewashing;

judging whether the tableware is in a low oil state, a normal oil state or a high oil state according to the calculated residual oil content; judging whether the tableware belongs to a low salt state, a normal salt state or a high salt state according to the calculated salt-containing residual quantity;

further, the dishwasher further comprises a washing parameter adjusting module;

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A washing control method of a dishwasher, comprising the steps of:

(2) carrying out first prewashing, recording a plateau period, acquiring a TOC value and a TDS value of water in a circulating water channel of the dishwasher, and calculating average values of the plateau period, wherein the average values are respectively recorded as a first TOC value and a first TDS value;

2. A dishwasher washing control method according to claim 1, characterized in that said step (5) comprises in particular:

3. A washing control method of a dishwasher according to claim 1, characterized in that: and (4) if the judgment result in the step (5) is normal oil and normal salt, executing a preset standard washing process in the step (6), otherwise, executing a corresponding washing process after adjusting washing parameters, wherein the washing parameters comprise but are not limited to the addition amount of detergent, water temperature, rinsing times and main washing water amount.

4. A washing control method of a dishwasher according to claim 3, wherein in the step (6), the method of determining the addition amount of the detergent according to the judgment result of the step (5) is as follows:

5. A washing control method of a dishwasher according to claim 3, wherein in the step (6), the method of determining the water temperature according to the judgment result of the step (5) is as follows:

6. A washing control method of a dishwasher according to claim 3, wherein in the step (6), the number of rinsing times is determined according to the judgment result of the step (5) as follows:

7. A dishwasher, characterized by: the dishwasher control system comprises a TOC sensor, a TDS sensor, a data processing and analyzing module and an executing module, wherein the TOC sensor is used for detecting a TOC value of water in the working process of the dishwasher, and the TDS sensor is used for detecting a TDS value of the water in the working process of the dishwasher; the execution module executes a corresponding washing process according to the processing result of the data processing and analyzing module; wherein the data processing and analyzing module executes the following steps:

carrying out first prewashing, recording a plateau period, acquiring a TOC value and a TDS value of water in a circulating water path of the dishwasher, calculating an average value of the plateau period, and respectively recording the average value as a first TOC value and a first TDS value;

8. A dishwasher according to claim 7, wherein: the dishwasher further comprises a washing parameter adjusting module;