CN112741519B - A simple method for automatic foaming and liquid discharge of children's hand sanitizer - Google Patents

Abstract

The invention relates to a simple method for automatically foaming and dispensing liquid for children's hand sanitizer. When it is determined that there is a child user in front of the hand sanitizer machine, the current emotional state of the child user is detected, and the child user's emotional state is determined before identification Whether the child user is willing to wash his hands, and when it is determined that the child user needs to wash his hands, the type of bacteria, the skin type and the pollution degree of the palm of the child user to be cleaned are detected, and the hand sanitizer machine automatically matches the child user The current type of palm skin to be cleaned matches the output of the foaming liquid that kills the type of bacteria on the palm, so as to facilitate the washing and cleaning needs of children's users, and also protects the palm skin of children's users, avoiding the use of non-matching foaming liquid for children's users Injuries to the skin of the palms.

Description

A simple method for automatic foaming and liquid discharge of children's hand sanitizer

technical field

The invention relates to the field of hand sanitizer machines, in particular to a method for automatically foaming and discharging simple children's hand sanitizer.

Background technique

Hand sanitizers are becoming more and more popular, and different types of hand sanitizers have been installed in many public places. Automatically controlling the output of hand sanitizer and water through the hand sanitizer machine can help users keep their hands clean and hygienic, and reduce the incidence of respiratory and intestinal diseases.

However, there are some problems in the existing hand sanitizer machines: the existing hand sanitizer machines are not specially designed for special groups such as children users, which makes it difficult to effectively protect the children's users in the hand sanitizer discharge method of the current hand sanitizer machines. The skin of the palm is even more unable to meet the needs of adaptive foaming liquid for different types of bacteria on the palm of the child user, which affects the hand washing and cleaning effect of the child user.

Contents of the invention

The technical problem to be solved by the present invention is to provide a simple method for automatically foaming and discharging children's hand sanitizer in view of the above-mentioned prior art.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a simple method for automatically foaming and releasing liquid of children's hand sanitizer, which is characterized in that it includes the following steps 1 to 13:

Step 1, detect whether there is a child user in front of the hand sanitizer machine;

Step 2, making judgments and processing according to the detection results:

When there are child users, go to step 3; otherwise, after suspending the detection for a preset period of time, go to step 1;

Step 3, detect the emotional state of the child user, and turn to step 4;

Step 4, process according to the emotional state detection result of the child user:

When the emotional state of the child user is non-excited, go to step 5; otherwise, after the hand sanitizer machine plays a video that relieves the current agitation of the child user, go to step 3;

Step 5, identify the child user's willingness to wash hands, and go to step 6;

Step 6: Process according to the identification result of the child user's willingness to wash hands:

When the willingness of the child user to wash hands is the need to wash hands, go to step 7; otherwise, go to step 1;

Step 7, detect the bacteria type and skin type of the child user's palm to be cleaned, and go to step 8;

Step 8, according to the results of the detection of the type of bacteria on the palm of the hand to be cleaned:

When the detected bacteria type is in the preset bacteria type list, go to step 9; otherwise, go to step 10;

Step 9, control the hand sanitizer machine to output foaming liquid that matches the skin type of the palm of the child user to be cleaned and can disinfect the type of bacteria;

Step 10, detecting the pollution degree of the child user's palm to be cleaned, and turning to step 11;

Step 11, according to the detection results of the pollution degree of the palm to be cleaned, make a treatment:

When the pollution degree of the palm to be cleaned is greater than the preset pollution degree threshold, proceed to step 12; otherwise, proceed to step 13;

Step 12, control the hand sanitizer machine to output the foaming liquid matching the skin type of the palm of the child user to be cleaned according to the maximum preset foaming liquid output;

Step 13, control the hand sanitizer machine to output foaming liquid matching the skin type of the palm of the child user to be cleaned according to the minimum preset output of foaming liquid.

Improvement, in the said simple children's hand sanitizer automatic foaming method, after step 9, step 12 and step 13 respectively control the hand sanitizer machine to output the foaming liquid, it also includes:

Detect the temperature value of the palm of the child user to be cleaned and the current ambient temperature value of the hand sanitizer machine, and calculate the temperature difference between the temperature value of the palm to be cleaned and the current ambient temperature;

According to the temperature value of the child user's palm to be cleaned and the calculated temperature difference, control the water temperature of the water to be discharged in the hand sanitizer machine to adjust to the optimum comfortable water temperature;

Control the output of the water flow adjusted to the optimum comfortable water temperature to the palm of the child user to be cleaned;

And after the water flow output time with the optimum comfortable water temperature reaches the preset water flow output time, the water flow output is stopped.

Specifically, the water temperature of the water to be discharged from the hand sanitizer machine is adjusted to the optimum comfortable water temperature as follows:

其中，C_Water,opt为洗手液机内待流出水流的水温调整后的最佳舒适水温，C_Hand为所述待清洗手掌部位温度值，△C为所述温度差值。

Wherein, C _{Water, opt} is the optimum comfortable water temperature after adjusting the temperature of the water flowing out of the hand sanitizer, C _Hand is the temperature value of the palm to be cleaned, and ΔC is the temperature difference.

Further, in the method of automatic foaming and liquid discharge of the simple children's hand sanitizer, before controlling the adjusted water flow to be output to the child's user's palm to be cleaned, it also includes:

Detect the height of child users;

And, according to the height of the child user, the water flow output end of the hand sanitizer machine is adjusted to move to an optimal position matching the height of the child user; wherein, the optimal position is half of the height value of the child user.

Further improved, in the method of automatic foaming and liquid discharge of the simple children's hand sanitizer, in step 1, it is detected whether there is a child user in front of the hand sanitizer machine according to the following steps S1-S4:

Step S1, acquiring facial images of persons within a preset distance directly in front of the hand sanitizer machine;

Step S2, acquiring facial infrared data and height of the person;

Step S3, making a judgment based on the acquired facial image and facial infrared data of the person:

When the facial image is a portrait and the facial infrared data is within the preset infrared data threshold range, go to step S4; otherwise, determine that the person is a non-child user;

Step S4, making a judgment based on the acquired height of the person:

When the height of the person is smaller than the preset height value, it is determined that the person is a child user; otherwise, it is determined that the person is a non-child user.

Preferably, in the method for automatically foaming and dispensing the simple children's hand sanitizer, the preset time period in step 2 is 8s.

Further, in the method of automatic foaming and dispensing of the simple children's hand sanitizer, in step 5, the child user's willingness to wash hands is identified according to the following steps a1-a5:

△T₁>0，I为洗手液机在第一预设采集时间段T₁内所采集弯腰倾斜角度值的总数量；Step a1, the hand sanitizer machine obtains the bending angle value of the child user within the first preset collection time interval according to the first preset collection time interval, and forms a set of bending angle angles representing the child user; wherein, the first A preset collection time interval is marked as △T ₁ , the first preset collection time period is marked as T ₁ , the child user's bending angle set is marked as θ, and the i-th child user's bending angle set θ is The bending angle value is marked as θ _i , θ={θ _i }, 1≤i≤I,

△T ₁ >0, I is the total number of bending angle values collected by the hand sanitizer machine in the first preset collection time period T ₁ ;

Step a2, the hand sanitizer machine acquires the average moving speed of the palm of the child user moving to the output end of the hand sanitizer within the first preset collection time period; wherein, the average moving speed of the palm of the child user is marked as v;

儿童用户的手掌倾斜角度集合/>

内的第j个手掌倾斜角度值标记为/>

1≤j≤J，/>

△T₂>0，J为洗手液机在第二预设采集时间段T₂内所采集儿童用户的手掌倾斜角度值的总数量；Step a3, the hand sanitizer machine obtains the palm inclination angle value of the palm of the child user within the second preset collection time interval according to the second preset collection time interval, and forms a set of palm inclination angles representing the palm inclination degree of the child user; wherein , the second preset collection time interval is marked as △T ₂ , the second preset collection time period is marked as T ₂ , and the set of palm tilt angles of the child user's palm tilt is marked as

Collection of palm tilt angles for child users />

The jth palm tilt angle value within is marked as />

1≤j≤J, />

△T ₂ >0, J is the total number of palm inclination angle values of child users collected by the hand sanitizer machine within the second preset collection time period T ₂ ;

Step a4, the hand sanitizer machine obtains the handwashing willingness index representing the child user according to the set of bending inclination angles, the set of palm inclination angles and the average moving speed of the palm; wherein, the handwashing willingness index of the child user is marked as ψ :

In step a5, the hand sanitizer machine makes a judgment according to the hand washing willingness index of the child user:

When the child user's hand-washing willingness index is greater than the preset hand-washing willingness index threshold, the hand sanitizer machine determines that the child user's hand-washing willingness needs to wash hands; otherwise, the hand sanitizer machine determines that the child user's hand-washing willingness does not need to wash hands.

Further, in the method of automatic foaming and dispensing of simple children's hand sanitizer, the first preset collection time interval ΔT ₁ =0.01s, the first preset collection time period T ₁ =5s; the The second preset collection time interval ΔT ₂ =0.005s, the second preset collection time period T ₁ =10s, and the preset hand washing willingness index threshold is 0.55.

Further improved, in the method of automatic foaming and liquid discharge of the simple children's hand sanitizer, in step 10, the pollution degree of the palm of the child user's need to be cleaned is detected according to the following steps b1-b3:

Step b1, detecting the area of the palm to be cleaned under the water flow output end of the hand sanitizer machine;

Step b2, detecting the area of the palm that is located on the palm to be cleaned and has pollutants, and using the detected area as the contaminated area of the palm to be cleaned;

Step b3, calculating the ratio between the contaminated area of the palm to be cleaned and the area of the palm to be cleaned, and using the ratio as the pollution degree of the palm to be cleaned.

Further improved, in the method for automatically foaming and discharging the simple children's hand sanitizer, the preset pollution degree threshold is 20%.

Compared with the prior art, the present invention has the advantages of:

First of all, the invention detects the current emotional state of the child user when it is determined that there is a child user in front of the hand sanitizer machine, and then identifies whether the child user has the willingness to wash hands after determining the emotional state of the child user, and determines that the child user When it is necessary to wash hands, the type of bacteria, skin type and pollution degree of the palm of the child user to be cleaned are detected, and the hand sanitizer machine automatically matches and kills the child user's current palm skin type to be cleaned Bacteria-type foaming liquid is output on the palm to facilitate children's handwashing and cleaning needs, and it also protects the skin of the palm of the child's user to avoid damage to the skin of the palm of the child's user by non-matching foaming liquid.

In addition, the invention’s simple children’s hand sanitizer automatic foaming liquid discharge method will also be processed and characterized according to the collection of the bending angle of the child user, the average moving speed of the user’s palm moving towards the output end of the hand sanitizer, and the collection of palm inclination angle values The child user's hand-washing willingness index, and then according to the comparison between the obtained hand-washing willingness index and the preset hand-washing willingness index threshold, determine whether the child user in front of the hand sanitizer machine currently has a hand-washing willingness, and realizes multiple posture factors based on the child user Comprehensive judgment to accurately judge the effect of children's willingness to wash their hands.

Description of drawings

Fig. 1 is a schematic flow chart of a method for automatically foaming and discharging a simple children's hand sanitizer in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

This embodiment provides a simple method for automatically foaming and discharging children's hand sanitizer. Referring to Fig. 1, the method of automatic foaming and discharging of the simple children's hand sanitizer includes the following steps 1 to 13:

Step 1. Detect whether there is a child user in front of the hand sanitizer machine; wherein, in this embodiment, detect whether there is a child user in front of the hand sanitizer machine according to the following steps S1-S4:

Step S1, acquiring facial images of persons within a preset distance directly in front of the hand sanitizer machine;

Step S2, acquiring facial infrared data and height of the person;

Step S3, making a judgment based on the acquired facial image and facial infrared data of the person:

When the facial image is a portrait and the facial infrared data is within the preset infrared data threshold range, go to step S4; otherwise, determine that the person is a non-child user;

Step S4, making a judgment based on the acquired height of the person:

When the height of the person is smaller than the preset height value, it is determined that the person is a child user; otherwise, it is determined that the person is a non-child user; for example, the preset height value here can be set to 100cm;

Step 2, making judgments and processing according to the detection results:

When there is a child user, go to step 3; otherwise, after suspending the detection for a preset time period, go to step 1; where the preset time period here is set to 8s;

Step 3, detect the emotional state of the child user, and turn to step 4; wherein, the detection of the emotional state of the child user can be realized by using existing conventional technical means such as facial expression recognition, and will not be repeated here;

Step 4, process according to the emotional state detection result of the child user:

When the emotional state of the child user is non-excited, go to step 5; otherwise, after the hand sanitizer machine plays a video that relieves the current agitation of the child user, go to step 3;

Step 5, identify the child user's willingness to wash hands, and turn to step 6; wherein, this embodiment identifies the child user's willingness to wash hands according to the following steps a1-a5:

△T₁>0，I为洗手液机在第一预设采集时间段T₁内所采集弯腰倾斜角度值的总数量；此处的第一预设采集时间间隔△T₁＝0.01s，第一预设采集时间段T₁＝5s；Step a1, the hand sanitizer machine obtains the bending angle value of the child user within the first preset collection time interval according to the first preset collection time interval, and forms a set of bending angle angles representing the child user; wherein, the first A preset collection time interval is marked as △T ₁ , the first preset collection time period is marked as T ₁ , the child user's bending angle set is marked as θ, and the i-th child user's bending angle set θ is The bending angle value is marked as θ _i , θ={θ _i }, 1≤i≤I,

△T ₁ >0, I is the total number of bending angle values collected by the hand sanitizer machine within the first preset collection time period T ₁ ; here, the first preset collection time interval △T ₁ =0.01s, The first preset collection time period T ₁ =5s;

Step a2, the hand sanitizer machine acquires the average moving speed of the palm of the child user moving to the output end of the hand sanitizer within the first preset collection time period; wherein, the average moving speed of the palm of the child user is marked as v;

儿童用户的手掌倾斜角度集合/>

内的第j个手掌倾斜角度值标记为/>

1≤j≤J，/>

△T₂>0，J为洗手液机在第二预设采集时间段T₂内所采集儿童用户的手掌倾斜角度值的总数量；其中，此处的第二预设采集时间间隔△T₂＝0.005s，第二预设采集时间段T₂为10s；Step a3, the hand sanitizer machine obtains the palm inclination angle value of the palm of the child user within the second preset collection time interval according to the second preset collection time interval, and forms a set of palm inclination angles representing the palm inclination degree of the child user; wherein , the second preset collection time interval is marked as △T ₂ , the second preset collection time period is marked as T ₂ , and the set of palm tilt angles of the child user's palm tilt is marked as

Collection of palm tilt angles for child users />

The jth palm tilt angle value within is marked as />

1≤j≤J, />

△T ₂ >0, J is the total number of child users’ palm tilt angle values collected by the hand sanitizer machine within the second preset collection time period T ₂ ; where, the second preset collection time interval here is △T ₂ =0.005s, the second preset acquisition time period _T2 is 10s;

Step a4, the hand sanitizer machine obtains the handwashing willingness index representing the child user according to the set of bending inclination angles, the set of palm inclination angles and the average moving speed of the palm; wherein, the handwashing willingness index of the child user is marked as ψ :

In step a5, the hand sanitizer machine makes a judgment according to the hand washing willingness index of the child user:

When the child user's hand-washing willingness index is greater than the preset hand-washing willingness index threshold, the hand sanitizer machine determines that the child user's hand-washing willingness needs to wash hands; otherwise, the hand sanitizer machine determines that the child user's hand-washing willingness does not need to wash hands; where, The preset hand washing willingness index threshold is 0.55;

Step 6: Process according to the identification result of the child user's willingness to wash hands:

When the willingness of the child user to wash hands is the need to wash hands, go to step 7; otherwise, go to step 1;

Step 7, detect the bacteria type and skin type of the child user's palm to be cleaned, and go to step 8;

Step 8, according to the results of the detection of the type of bacteria on the palm of the hand to be cleaned:

When the detected bacteria type is in the preset bacteria type list, it means that there are harmful bacteria that need to be eliminated on the child user’s palm to be cleaned at this time, then go to step 9; otherwise, go to step 10;

Step 9, control the hand sanitizer machine to output foaming liquid that matches the skin type of the palm of the child user to be cleaned and can disinfect the type of bacteria; for example, the output volume of the foaming liquid output in step 9 can be controlled at 6mL ;

Step 10, detect the pollution degree of the child user's palm to be cleaned, and turn to step 11; wherein, in this step 10, detect the pollution degree of the child user's palm to be cleaned according to the following steps b1-b3:

Step b1, detecting the area of the palm to be cleaned under the water flow output end of the hand sanitizer machine;

Step b2, detecting the area of the palm that is located on the palm to be cleaned and has pollutants, and using the detected area as the contaminated area of the palm to be cleaned;

Step b3, calculating the ratio between the contaminated area of the palm to be cleaned and the area of the palm to be cleaned, and using the ratio as the pollution degree of the palm to be cleaned;

Step 11, according to the detection results of the pollution degree of the palm to be cleaned, make a treatment:

When the pollution degree of the palm to be cleaned is greater than the preset pollution degree threshold, go to step 12; otherwise, go to step 13; the preset pollution degree threshold here is 20%;

Step 12, control the hand sanitizer machine to output foaming liquid that matches the skin type of the palm of the child user to be cleaned according to the maximum preset output of foaming liquid; the maximum preset output of foaming liquid here is 10 mL;

Step 13, control the hand sanitizer machine to output foaming liquid matching the skin type of the palm of the child user to be cleaned according to the minimum preset output of foaming liquid. Wherein, the minimum preset foaming liquid output here is 5mL.

Of course, in order to improve the absorption of the foaming liquid outputted by the hand sanitizer machine, the child user can further clean the palms coated with the foaming liquid more comfortably. In this embodiment, in step 9, step 12 and step 13 After separately controlling the output of the foaming liquid from the hand sanitizer machine, it also includes:

Detect the temperature value of the palm of the child user to be cleaned and the current ambient temperature value of the hand sanitizer machine, and calculate the temperature difference between the temperature value of the palm to be cleaned and the current ambient temperature;

According to the temperature value of the child user's palm to be cleaned and the calculated temperature difference, control the water temperature of the water to be discharged in the hand sanitizer machine to adjust to the optimum comfortable water temperature;

Control the output of the water flow adjusted to the optimum comfortable water temperature to the palm of the child user to be cleaned;

其中，C_Water,opt为洗手液机内待流出水流的水温调整后的最佳舒适水温，C_Hand为所述待清洗手掌部位温度值，△C为所述温度差值。And after the water flow output time with the optimum comfortable water temperature reaches the preset water flow output time, the water flow output is stopped. Wherein, the water temperature of the water flow to be discharged in the hand sanitizer machine of this embodiment is adjusted to the best comfortable water temperature as follows:

Wherein, C _{Water, opt} is the optimum comfortable water temperature after adjusting the temperature of the water flowing out of the hand sanitizer, C _Hand is the temperature value of the palm to be cleaned, and ΔC is the temperature difference.

Of course, for the convenience of child users, it is easier and more comfortable to receive the water flow for cleaning the palms output by the hand sanitizer machine. As an improvement, this embodiment controls the output of the adjusted water flow to the child user's palms to be cleaned. The height of the child user will also be detected; and, according to the height of the child user, the water flow output end of the hand sanitizer is adjusted to move to the best position matching the height of the child user; wherein, the best position is the height value of the child user half position.

It should be noted that this embodiment detects the current emotional state of the child user when it is determined that there is a child user in front of the hand sanitizer machine, and then identifies whether the child user has the willingness to wash hands after determining the emotional state of the child user, and When it is determined that the child user needs to wash his hands, the type of bacteria, the skin type, and the pollution degree of the palm of the child's user to be cleaned are detected, so that the hand sanitizer machine automatically uses the hand sanitizer to match the skin type of the child's current palm to be cleaned. The output of the foaming liquid that matches and kills the type of bacteria on the palm is convenient for children's users to wash their hands and clean their hands. Not only that, the simple children's hand sanitizer automatic foaming and dispensing method in this embodiment will also process according to the child user's bending inclination angle set, the user's palm moving speed average and palm inclination angle value set when the palm moves to the hand sanitizer output end. Obtain the hand-washing willingness index that characterizes the child user, and then judge whether the child user in front of the hand sanitizer machine currently has a hand-washing willingness based on the comparison between the obtained hand-washing willingness index and the preset threshold value of the hand-washing willingness index. Postural factors are comprehensively judged to accurately judge the effect of children's willingness to wash their hands.

Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations of the present invention will occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (4)

1. A method for automatically foaming liquid discharge of simple children's hand sanitizer, characterized in that it comprises the following steps 1 to 13: Step 1, detect whether there is a child user in front of the hand sanitizer machine; Step 2, making judgments and processing according to the detection results: When there are child users, go to step 3; otherwise, after suspending the detection for a preset period of time, go to step 1; Step 3, detect the emotional state of the child user, and turn to step 4; Step 4, process according to the emotional state detection result of the child user: When the emotional state of the child user is non-excited, go to step 5; otherwise, after the hand sanitizer machine plays a video that relieves the current agitation of the child user, go to step 3; Step 5, identify the child user's willingness to wash hands, and turn to step 6; wherein, in this step 5, identify the child user's willingness to wash hands according to the following steps a1-a5: Step a1, the hand sanitizer machine obtains the bending angle value of the child user within the first preset collection time interval according to the first preset collection time interval, and forms a set of bending angle angles representing the child user; wherein, the first A preset collection time interval is marked as △T ₁ , the first preset collection time period is marked as T ₁ , the child user's bending angle set is marked as θ, and the i-th child user's bending angle set θ is The bending angle value is marked as θ _i , θ={θ _i }, 1≤i≤I,

△T ₁ >0, I is the total number of bending angle values collected by the hand sanitizer machine in the first preset collection time period T ₁ ; Step a2, the hand sanitizer machine acquires the average moving speed of the palm of the child user moving to the output end of the hand sanitizer within the first preset collection time period; wherein, the average moving speed of the palm of the child user is marked as v; Step a3, the hand sanitizer machine obtains the palm inclination angle value of the palm of the child user within the second preset collection time interval according to the second preset collection time interval, and forms a set of palm inclination angles representing the palm inclination degree of the child user; wherein , the second preset collection time interval is marked as △T ₂ , the second preset collection time period is marked as T ₂ , and the set of palm tilt angles of the child user's palm tilt is marked as

Collection of palm tilt angles for child users />

The jth palm tilt angle value within is marked as />

△T ₂ >0, J is the total number of palm inclination angle values of child users collected by the hand sanitizer machine within the second preset collection time period T ₂ ; Step a4, the hand sanitizer machine obtains the handwashing willingness index representing the child user according to the set of bending inclination angles, the set of palm inclination angles and the average moving speed of the palm; wherein, the handwashing willingness index of the child user is marked as ψ :

In step a5, the hand sanitizer machine makes a judgment according to the hand washing willingness index of the child user: When the child user's hand-washing willingness index is greater than the preset hand-washing willingness index threshold, the hand sanitizer machine determines that the child user's hand-washing willingness needs to wash hands; otherwise, the hand sanitizer machine determines that the child user's hand-washing willingness does not need to wash hands; Step 6: Process according to the identification result of the child user's willingness to wash hands: When the willingness of the child user to wash hands is the need to wash hands, go to step 7; otherwise, go to step 1; Step 7, detect the bacteria type and skin type of the child user's palm to be cleaned, and go to step 8; Step 8, according to the results of the detection of the type of bacteria on the palm of the hand to be cleaned: When the detected bacteria type is in the preset bacteria type list, go to step 9; otherwise, go to step 10; Step 9, control the hand sanitizer machine to output foaming liquid that matches the skin type of the palm of the child user to be cleaned and can disinfect the type of bacteria; Step 10, detect the pollution degree of the child user's palm to be cleaned, and turn to step 11; wherein, in this step 10, detect the pollution degree of the child user's palm to be cleaned according to the following steps b1-b3: Step b1, detecting the area of the palm to be cleaned under the water flow output end of the hand sanitizer machine; Step b2, detecting the area of the palm that is located on the palm to be cleaned and has pollutants, and using the detected area as the contaminated area of the palm to be cleaned; Step b3, calculating the ratio between the contaminated area of the palm to be cleaned and the area of the palm to be cleaned, and using the ratio as the pollution degree of the palm to be cleaned; Step 11, according to the detection results of the pollution degree of the palm to be cleaned, make a treatment: When the pollution degree of the palm to be cleaned is greater than the preset pollution degree threshold, proceed to step 12; otherwise, proceed to step 13; Step 12, control the hand sanitizer machine to output the foaming liquid matching the skin type of the palm of the child user to be cleaned according to the maximum preset foaming liquid output; Step 13, control the hand sanitizer machine to output the foaming liquid matching the skin type of the palm of the child user to be cleaned according to the minimum preset foaming liquid output; And, after step 9, step 12 and step 13 respectively control the hand sanitizer machine to output the foaming liquid, it also includes: Detect the temperature value of the palm of the child user to be cleaned and the current ambient temperature value of the hand sanitizer machine, and calculate the temperature difference between the temperature value of the palm to be cleaned and the current ambient temperature; According to the temperature value of the child user's palm to be cleaned and the calculated temperature difference, control the water temperature of the water flow to be discharged in the hand sanitizer machine to adjust to the optimum comfortable water temperature; wherein, the water temperature of the water flow to be discharged in the hand sanitizer machine is as follows Ways to adjust to the optimum comfortable water temperature:

Wherein, C _Water,opt is the best comfortable water temperature after adjusting the water temperature of the water flow to be discharged in the hand sanitizer machine, C _Hand is the temperature value of the palm part to be cleaned, and △C is the temperature difference; Control the output of the water flow adjusted to the optimum comfortable water temperature to the child user's palm to be cleaned; And after the water flow output time with the optimum comfortable water temperature reaches the preset water flow output time, the water flow output is stopped. 2. The simple children's hand sanitizer according to claim 1, wherein the method for automatically foaming and discharging liquid is characterized in that, before the controlled and adjusted water flow is output to the child's user's palm to be cleaned, the method also includes: Detect the height of child users; And, according to the height of the child user, adjust the water flow output end of the hand sanitizer machine to move to an optimal position matching the height of the child user; wherein, the optimal position is half of the height value of the child user. 3. The method according to any one of claims 1 to 2, characterized in that in step 1, whether there are children in front of the hand sanitizer machine according to the following steps S1 to S4 User makes detection: Step S1, acquiring facial images of persons within a preset distance directly in front of the hand sanitizer machine; Step S2, acquiring facial infrared data and height of the person; Step S3, making a judgment based on the acquired facial image and facial infrared data of the person: When the facial image is a portrait and the facial infrared data is within the preset infrared data threshold range, go to step S4; otherwise, determine that the person is a non-child user; Step S4, making a judgment based on the acquired height of the person: When the height of the person is smaller than the preset height value, it is determined that the person is a child user; otherwise, it is determined that the person is a non-child user. 4. The simple children's hand sanitizer according to claim 3 is characterized in that the preset time period in step 2 is 8s, and the preset pollution degree threshold value in step 11 is 20 %.

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