Liquid food making control method for liquid heater with non-contact detection

Abstract

A liquid food making control method for a liquid heater with non-contact detection. A plurality of capacitive electrode sheets for non-contact detection of water and foam are arranged on a detection plate (5) of the liquid heater in the height direction. The capacitive electrode sheets at the upper part of the detection plate (5) are used as anti-overflow determination positions for measuring different foam heights, and the capacitive electrode sheets at the lower part of the detection plate (5) measure the initial water level in a glass container (1) during the current liquid food making of the liquid heater. According to the initial water level and a preset corresponding relationship, the corresponding capacitive electrode plates at the upper part of the detection plate for foam detection are determined for the current liquid food making, and then the capacitive electrode sheets at the upper part of the detection plate (5) are used as initial anti-overflow determination positions for the current liquid food making, so as to perform a liquid food making operation. The method enables different initial water levels to have different initial anti-overflow determination positions for liquid food making, thus improving the efficiency of making liquid food, shortening the making period, saving more energy, improving the anti-overflow reliability and intelligent degree, and remarkably improving the user experience.

Description

A pulping control method for a liquid heater with remote detection

[0001] This application claims priority to the following Chinese patent applications, the entire contents of which are incorporated herein by reference:

[0002] A Chinese patent application with application number 202311436066.0, titled “A Liquid Level Detection Method for a Liquid Heater,” was submitted to the China Patent Office on November 1, 2023;

[0003] A Chinese patent application was submitted to the China Patent Office on March 26, 2024, with application number 202410347205.0 and invention name “A pulping control method for a liquid heater with remote detection”. Technical Field

[0004] The present application belongs to the technical field of kitchen appliances, and in particular relates to a method for controlling pulping of a liquid heater with remote detection. Background Art

[0005] Liquid heaters or food processors used to make drinks such as soy milk and rice porridge are widely used kitchen appliances. In some existing liquid heaters, an anti-overflow electrode rod is usually set on the machine head, cup body or cup lid to detect foam on the surface of the slurry. When the foam touches the anti-overflow electrode rod, the heating component is controlled to stop working to avoid overflow. In other existing liquid heaters, PCB boards or PFB soft boards are used for overflow detection. However, based on the characteristics of the foam and its uneven surface, it is impossible to accurately identify it as foam. In addition, the pulping capacity range of the above-mentioned existing liquid heaters is relatively narrow.

[0006] Therefore, how to improve the accuracy of foam detection of liquid heaters to improve the reliability and intelligence of anti-overflow detection and increase the pulping capacity range of liquid heaters is an urgent problem that people in this field need to solve.

[0007] Summary of the Invention

[0008] The purpose of the present invention is to provide a pulping control method for a liquid heater with remote detection. By adopting the pulping control method of the liquid heater, different initial water levels can be used to make pulp with corresponding initial anti-overflow judgment positions, thereby greatly improving the pulping efficiency, shortening the production cycle when making low-water-level beverages, and making pulping more energy-efficient. The reliability and intelligence of anti-overflow detection are higher, which significantly improves the user experience.

[0009] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a pulping control method for a liquid heater with air-detection, the liquid heater includes a glass container, and a strip-shaped detection plate is provided on the outer wall of the glass container, and the detection plate is provided with multiple capacitor electrodes for air-detecting water and foam along the height direction, characterized in that: the detection height of a single capacitor electrode for detecting foam is greater than the detection height of a single capacitor electrode for detecting water, and the different capacitor electrodes on the upper part of the detection plate are used as anti-overflow judgment positions for detecting different foam heights, and the initial water level added to the glass container during the current pulping of the liquid heater is detected by the capacitor electrode at the lower part of the detection plate, and the capacitor electrode on the upper part of the detection plate corresponding to the foam detection is determined according to the initial water level and the pre-set correspondence, and the capacitor electrode on the upper part of the detection plate is used as the initial anti-overflow judgment position for this pulping to perform the pulping operation.

[0010] In one embodiment, the preset correspondence includes a plurality of water level detection segments for detecting the initial water level, each water level detection segment has a different detection height, each water level detection segment corresponds to a different capacitor electrode, each water level detection segment has a one-to-one corresponding initial anti-overflow judgment position, and each initial anti-overflow judgment position is located above the corresponding water level detection segment, and the pulping control method also includes determining the corresponding water level detection segment according to the initial water level, and then obtaining the corresponding initial anti-overflow judgment position according to the water level detection segment.

[0011] In one embodiment, the preset correspondence includes a preset height value, and the capacitor electrode corresponding to the height of the capacitor electrode detecting the initial water level on the detection board plus the preset height value is used as the initial anti-overflow judgment position for this pulping.

[0012] In one embodiment, the initial water level is obtained within 5 seconds after the user selects a function and starts the operation.

[0013] In one embodiment, the liquid heater performs a pulping operation according to a configured pulping program adaptively configured according to the initial water level, wherein the configured pulping program includes the configuration of different heating parameters and / or different crushing parameters, the heating parameters include heating time and / or heating power, and the crushing parameters include crushing time and / or motor stirring power and / or motor speed.

[0014] In one embodiment, the water level detection section includes an ultra-low water level detection section, a low water level detection section, a medium water level detection section, and a high water level detection section, and the initial overflow prevention judgment position includes an ultra-low water level overflow prevention judgment position, a low water level overflow prevention judgment position, and a medium-high water level overflow prevention judgment position, and the pulping control method further includes:

[0015] When the initial water level is within the ultra-low water level detection range, the initial overflow prevention judgment position corresponding to the initial water level is obtained as the ultra-low water level overflow prevention judgment position;

[0016] When the initial water level is within the low water level detection range, the initial overflow prevention judgment position corresponding to the initial water level is obtained as the low water level overflow prevention judgment position;

[0017] When the initial water level is within the range of the middle water level detection section or the range of the high water level detection section, the initial overflow prevention judgment position corresponding to the initial water level is obtained as the middle-high water level overflow prevention judgment position.

[0018] In one embodiment, the pulping control method further comprises: when the initial water level is below the ultra-low water level detection section, determining that there is no water or the water level is ultra-low in the glass container, and controlling the liquid heater to give an alarm;

[0019] Alternatively, the water level detection section also includes an ultra-high water level detection section, and the pulping control method also includes: when the initial water level is within the range of the ultra-high water level detection section, configuring an ultra-high water level pulping program to perform pulping, and performing overflow prevention control according to the overflow prevention temperature preset in the ultra-high water level pulping program; when the initial water level is above the ultra-high water level detection section, judging that the water level in the glass container is ultra-high, and controlling the liquid heater to alarm.

[0020] In one embodiment, the pulping control method further comprises:

[0021] Performing a pulping operation according to a pulping program adaptively configured according to the initial water level, wherein the pulping program includes adaptively adjusting the corresponding heating power P=P0*(V0 / V) according to the obtained initial water level V, wherein V0 is a preset minimum water level and P0 is the heating power corresponding to the preset minimum water level V0;

[0022] Alternatively, the pulping operation is performed according to a pulping program that is adaptively configured according to the initial water level. The pulping program includes adaptively adjusting the corresponding motor speed S=S0+ΔS*(V0 / V) according to the obtained initial water level V, wherein V0 is the preset minimum water level, S0 is the motor speed corresponding to the preset minimum water level V0, and ΔS is a preset constant.

[0023] In one embodiment, the capacitor electrode includes a first capacitor electrode, a second capacitor electrode and a third capacitor electrode arranged in sequence from bottom to top along the height direction of the detection plate, the first capacitor electrode is used to detect a first initial water level added to the glass container, the second capacitor electrode is used to detect a first initial anti-overflow judgment position corresponding to the first initial water level, and the second capacitor electrode is reused to detect a second initial water level added to the glass container, and the third capacitor electrode is used to detect a second initial anti-overflow judgment position corresponding to the second initial water level.

[0024] In one embodiment, the pulp making control method further includes: after the user selects a function and starts working, first obtain the static water level V1, then drive the motor to stir to obtain the dynamic water level V2, and then calculate the initial water level according to the difference between V1 and V2:

[0025] When |V2 - V1| ≤ ΔV, take V2 as the initial water level;

[0026] When |V2 - V1| > ΔV, take (V2 + V1) / 2 as the initial water level; where ΔV is a preset value.

[0027] In one embodiment, during the pulp making operation, when it is detected that the pulp continuously generates an overflow signal at the initial overflow judgment position, it is confirmed that the pulp is in abnormal adhesion, and the overflow judgment position is dynamically adjusted, and the overflow judgment position above the initial overflow judgment position is used as the new overflow judgment position to continue the pulp making operation.

[0028] In one embodiment, the overflow judgment position includes the highest overflow judgment position. During the boiling process of the pulp, when it is detected that the pulp continuously generates an overflow signal at the highest overflow judgment position, it is confirmed that the pulp is in abnormal adhesion, and the heating parameters are configured according to the current pulp temperature T to continue the boiling operation.

[0029] In one embodiment, an overflow temperature Td at the current altitude is also preset, and the relationship between T and Td is as follows:

[0030] When T < Td - 10, heat the pulp at 1 / 2 Pr power;

[0031] When Td - 10 ≤ T < Td - 5, heat the pulp at 1 / 3 Pr power;

[0032] When Td - 5 ≤ T < Td - 3, heat the pulp at 1 / 4 Pr power;

[0033] When Td - 3 ≤ T, stop heating; where Pr is the rated heating power of the heating tube.

[0034] For the liquid heater of the present invention, a strip-shaped detection plate is provided on the outer wall of the glass container. A plurality of capacitive electrodes are provided on the detection plate in the height direction. The present invention utilizes the principle of non-contact induction, and different capacitive electrodes are used to separately detect the water level signal (water) and the overflow signal (foam) non-contact, so that the detection plate can replace the existing, protruding water level electrode and overflow electrode separately provided at different positions of the machine, realizing the integration of the functions of the liquid heater, and greatly reducing the manufacturing cost of the liquid heater. Moreover, there will no longer be cleaning dead corners around the overflow electrode or the water level electrode of the liquid heater, making it more convenient and cleaner for users to clean.

[0035] At the same time, the capacitor electrode on the upper part of the detection plate of the present invention is used as an anti-overflow judgment position for detecting different foam heights (i.e., anti-overflow heights), that is, it has multiple anti-overflow judgment positions, which can realize anti-overflow signal detection at multiple anti-overflow heights. Therefore, compared with the existing liquid heater with only one fixed anti-overflow electrode, the liquid heater of the present invention has multiple anti-overflow judgment positions that can detect the height of slurry foam or bubbles layer by layer for anti-overflow signals, which can completely avoid the problem of slurry overflow, and the reliability of detecting foam to prevent overflow is also higher. Moreover, the pulping range of the liquid heater of the present invention can also be designed to be wider, because each pulping capacity will have a separate anti-overflow judgment position for corresponding anti-overflow signal detection, and there is no need to worry about the slurry not touching the anti-overflow electrode or the slurry easily overflowing. Compared with the existing liquid heater with only one highest and fixed anti-overflow electrode, the liquid heater of the present invention does not need to heat the slurry all the time to generate more slurry foam to touch the anti-overflow electrode when making slurry with low water volume. Therefore, when the liquid heater of the present invention is pulping, there will be no problem of excessive power consumption, which not only effectively saves energy use, but also provides users with a wider range of pulping options, greatly improving the user experience.

[0036] In addition, for the pulping control method of the liquid heater of the present invention, the initial water level added to the glass container of the liquid heater during pulping is first detected by the capacitor electrode at the bottom of the detection plate, and the capacitor electrode corresponding to the detection foam (anti-overflow signal) at the upper portion of the detection plate is determined according to the initial water level and the pre-set correspondence, and the capacitor electrode at the upper portion of the detection plate is used as the initial anti-overflow judgment position for this pulping to perform pulping operation. It should be noted that the initial anti-overflow judgment position refers to the position where the foam signal (i.e., anti-overflow signal) is first detected during the pulping process (the position is usually understood as a range, not a point). When no abnormality occurs during the entire pulping process, the slurry generates an anti-overflow signal at the position of the initial anti-overflow judgment position, and performs anti-overflow operation control. When an adhesion abnormality occurs during the pulping process, even if the pulping operation is stopped, it will continue to be detected that the slurry generates an anti-overflow signal at the initial anti-overflow judgment position, indicating that an adhesion abnormality exists at this time, and the function of the initial anti-overflow judgment position to detect the anti-overflow signal has failed. In order to continue to complete the pulping operation, avoid production waste, and reduce unnecessary operating troubles for users, the liquid heater of the present invention will dynamically adjust the new anti-overflow judgment position during the remaining pulping process. At this time, the new anti-overflow judgment position can not only solve the adhesion abnormality and ensure that the pulping operation can be completed, but also prevent the occurrence of slurry overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0038] FIG1 is a schematic structural diagram of an embodiment of a liquid heater of the present invention;

[0039] FIG2 is a schematic diagram of the front structure of the detection board in FIG1;

[0040] FIG3 is a schematic diagram of the back structure of the detection board in FIG1 ;

[0041] FIG4 is another structural schematic diagram of the detection board in FIG1 . DETAILED DESCRIPTION

[0042] In existing liquid heaters or food processing machines, an outwardly protruding anti-overflow electrode rod is generally provided on the machine head, cup body or cup cover to detect foam on the surface of the slurry (slurry foam, bubbles, and foam are all synonymous), as disclosed in Chinese applications CN200920050366.4 and CN200910040598.6. When the foam touches the anti-overflow electrode rod, a signal is transmitted to the main control, that is, the main control obtains the anti-overflow signal of the foam, and the main control controls the heating component to stop working and let the foam fall back, thus preventing the problem of slurry overflow during the pulping process. Based on this, the detection of foam and the detection of anti-overflow signal mentioned in the specification of the present invention are descriptions of the same meaning. Correspondingly, the detection of water and the detection of water level signal are also descriptions of the same meaning.

[0043] For the food processor with the above structure, on the one hand, the anti-overflow electrode rod protrudes and is exposed on the outside of the machine, creating a blind spot for cleaning and making it difficult to clean thoroughly. On the other hand, the anti-overflow electrode rod is generally located below the cup mouth, relatively close to the cup mouth. For making slurry beverages with relatively high water levels, the anti-overflow electrode rod can play a better role. However, when the pulping water level is low, although different pulping programs can be selected for pulping, because the anti-overflow electrode rod is far away from the bottom of the cup, it takes a long time to heat up during the pulping process to generate enough pulp foam to touch the anti-overflow electrode rod and generate an anti-overflow signal. This not only easily prolongs the pulping cycle, but also leads to unnecessary waste of electrical energy. Therefore, the pulping capacity of existing food processors is limited to a relatively narrow pulping range, such as 300ml to 600ml, 600ml to 900ml, 900ml to 1200ml, etc. Based on this, existing food processors are designed according to the capacity they can produce, such as small-scale soymilk machines and large-capacity soymilk machines. However, it is difficult for existing ordinary household food processors to achieve, for example, a product that can make drinks in a capacity range of 300ml to 1200ml, or even wider.

[0044] Chinese patent application CN202011545073.0 discloses a hands-free food processor that makes drinks by adding water multiple times and blending multiple times. It can make drinks in a wide range of 300ml to 1200ml to meet the drinking needs of different people. However, the production cycle of the above-mentioned blending drinks is long, and the taste of the blended drinks cannot meet the drinking needs of some consumers. In addition, the manufacturing cost of the hands-free food processor is higher, which affects the purchasing choice of some consumers.

[0045] At the same time, Chinese patent application CN201610753199.4 also discloses a food processor, in which a PCB board is hidden between the cup body and the hand-held handle of the food processor, and a metal sheet is provided on the PCB board. When the volume of the food in the cup changes, the capacitor formed by the metal sheet and the food in the cup will generate a charge signal, and the PCB board will then transmit the charge signal to the control circuit board. The control circuit board can judge the height of the current food liquid level in the cup according to the transmitted signal, and use the control circuit board to start and stop the electric heating element or the knife group to solve the problem of food overflow. Although the above solution can replace the protruding anti-overflow electrode rod by detecting foam (anti-overflow signal) through the PCB board, it can solve the problem of blind spots in cleaning of the anti-overflow electrode rod. However, in this solution, there is an installation gap between the PCB board and the cup body, and the PCB board cannot accurately detect the foam (anti-overflow signal). Moreover, the anti-overflow detection position of the PCB board is generally set at the highest point of the PCB board. During actual use, the metal sheet below the anti-overflow detection position can identify the water level signal. However, based on the characteristics of slurry foam and slurry foam, the fixed anti-overflow detection position is greatly affected by external parasitic capacitance and cannot accurately identify the foam (anti-overflow signal). At the same time, since the surface of the slurry foam is not flat, the fixed anti-overflow detection position may cause the detected anti-overflow position to deviate greatly from the actual slurry foam position, posing a safety risk of overflow. In addition, the above-mentioned food processor cannot make 300ml to 1200ml of slurry drinks at the same time.

[0046] In addition, the prior art CN201921962352.X also discloses a capacitive continuous liquid level detection structure and an electric kettle thereof, wherein the liquid level detection structure has two parallel-arranged sensing electrode sheets, and also discloses detecting the water level by a duty cycle. In this scheme, the outer surface of the electric kettle body is an arc-shaped structure, so it is necessary to use a soft PFB board to be installed on the outer wall of the kettle body by gluing. Since there are two sensing electrode sheets on the PFB soft board, when the water level rises, the sensing electrode sheets arranged in an arc shape on the outer wall of the kettle body will show a change in capacitance value. The sensing part near the actual water level can also sense the change in capacitance value, and the water level calculated according to the duty cycle will have a significant deviation from the actual water level, which reduces the accuracy of the detection. Fortunately, for the electric kettle, the water level detection deviation is not serious and will not cause a safety risk. However, the inventors have found that this solution can only be used for water level detection in electric kettles, but cannot detect anti-overflow signals because the conductivity of bubbles and foam is reduced, and the sensitivity of the sensing electrode to bubbles and foam is reduced. Moreover, the unevenness of the surface of bubbles and foam will further increase the error of the arc-shaped PFB soft board detection. Based on this, this solution is not suitable for the detection of anti-overflow signals and is prone to the safety risk of pulping overflow.

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] As shown in Figures 1, 2 and 3, it is a schematic structural diagram of a liquid heater of the present invention. The liquid heater is a food processing machine with a motor placed below for making soy milk beverages, comprising a glass container 1 forming a pulping cavity 10 and a cup cover 2 mounted on the glass container 1. The bottom of the glass container 1 is provided with a heating device (heating tube) 4 for heating the pulping cavity 10, and a motor 3 is provided in the installation cavity 20 below the glass container 1. The rotating shaft driven by the motor 3 passes through the bottom of the glass container 1 and extends into the pulping cavity 10, and the end of the rotating shaft is connected to a crushing device. A detection plate 5 for detecting the liquid level in the air is installed on the outer side of the side wall of the glass container 1, and the detection plate 5 is hidden and installed between the glass container 1 and the handle. A main control 6 is also provided in the installation cavity 20 below the glass container 1, and the main control 6 is electrically connected to the motor 3, the heating device (heating tube) 4 and the detection plate 5 respectively.

[0049] In this embodiment, a plurality of spaced capacitor electrodes are provided on the side of the detection plate 5 facing the glass container 1 (set as the front), and the capacitor electrodes include a plurality of first capacitor electrodes 51 located at the bottom of the detection plate 5 and a plurality of second capacitor electrodes 52 located at the top of the detection plate 5, and the detection height of a single second capacitor electrode 52 is greater than the detection height of a single first capacitor electrode 51. In addition, a shielding layer 53, a processing chip 54, and a connection port 55 are also provided on the back of the detection plate 5, wherein each capacitor electrode is electrically connected to the processing chip 54 via a printed circuit, and the processing chip 54 is electrically connected to the main control 6 via the connection port 55, so that the main control 6 receives the signal processed by the processing chip 54. The first capacitor electrodes 51 and the second capacitor electrodes 52 are arranged in sequence from bottom to top, and the height dimension of each second capacitor electrode 52 is larger than the height dimension of each first capacitor electrode 51. Among them, there are 4 first capacitor electrodes 51, which are L1 to L4 from bottom to top, and there are 5 second capacitor electrodes 52, all of which are arranged above all the first capacitor electrodes 51, and are distributed from bottom to top as L5 to L9. The first capacitor electrode 51 is used to detect the initial water level, and the second capacitor electrode 52 is used to detect the initial overflow prevention judgment position. It can be understood that the "detection height" of the capacitor electrode in this application refers to the detection range in the height direction. For a single capacitor electrode, the larger its size in the height direction, the larger the detection height of the capacitor electrode.

[0050] For the food processing machine of this embodiment, the main control 6 is pre-set with multiple water level detection segments for detecting water levels in the air and multiple overflow prevention judgment positions for detecting overflow in the air. Different water level detection segments have corresponding overflow prevention judgment positions corresponding to the detection of foam overflow signals, and each of the multiple overflow prevention judgment positions is located above its corresponding water level detection segment. In this embodiment, the multiple water level detection segments include an ultra-low water level detection segment H0, a low water level detection segment H1, a medium water level detection segment H2, a high water level detection segment H3, and an ultra-high water level detection segment H4, and the multiple water level detection segments are arranged in sequence from bottom to top. The overflow prevention judgment positions include an ultra-low water level overflow prevention judgment position F1, a low water level overflow prevention judgment position F2, and a medium-high water level overflow prevention judgment position F3, and F1, F2, and F3 are arranged in sequence from bottom to top. It can be understood that the water level refers to the height of the water surface in the pulping cavity 10 relative to the bottom of the pulping cavity 10. In this embodiment, the ultra-low water level detection section H0 refers to the range of the water surface between the bottom of the first capacitor electrode L1 and the top of the first capacitor electrode L1, the low water level detection section H1 refers to the range of the water surface between the bottom of the first capacitor electrode L2 and the top of the first capacitor electrode L3, the medium water level detection section H2 refers to the range of the water surface between the bottom of the first capacitor electrode L4 and the top of the second capacitor electrode L6, the high water level detection section H3 refers to the range of the water surface between the bottom of the second capacitor electrode L7 and the top of the second capacitor electrode L7, and the ultra-high water level detection section H4 refers to the range of the water surface between the bottom of the second capacitor electrode L8 and the top of the second capacitor electrode L9. That is, the first capacitor electrode L1 is used to detect the initial water level in the ultra-low water level detection section H0, the first capacitor electrodes L2-L3 are all used to detect the initial water level in the low water level detection section H1, the first capacitor electrode L4, the second capacitor electrode L5, and the second capacitor electrode L6 are all used to detect the initial water level in the medium water level section H2, the second capacitor electrode L7 is used to detect the initial water level in the high water level detection section H3, and the second capacitor electrodes L8-L9 are all used to detect the initial water level in the ultra-high water level section H4. At the same time, the second capacitor electrodes L5 and L6 are reused as the ultra-low water level overflow prevention judgment position F1, the second capacitor electrode L7 is reused as the low water level overflow prevention judgment position F2, and L8 and L9 are reused as the medium-high water level overflow prevention judgment position F3. It can be understood that the ultra-low water level overflow prevention judgment position F1 refers to the initial overflow prevention judgment position corresponding to the initial water level in the ultra-low water level detection section H0, the low water level overflow prevention judgment position F2 refers to the initial overflow prevention judgment position corresponding to the initial water level in the low water level detection section H1, and the medium and high water level overflow prevention judgment position F3 refers to the initial overflow prevention judgment position corresponding to the initial water level in the medium water level detection section H2 and the high water level detection section H3.

[0051] During the pulping process of the food processing machine of this embodiment, the main control 6 will first detect the initial water level added to the glass container 1 for this pulping based on the first capacitor electrode or the second capacitor electrode, and determine the water level detection section according to the initial water level. The main control 6 then determines the second capacitor electrode on the upper part of the detection plate 5 that is relatively used to detect the anti-overflow signal based on the water level detection section, and uses the second capacitor electrode as the initial anti-overflow judgment position for this pulping to perform pulping operations. At the same time, the main control 6 will also perform pulping operations based on the configured pulping program adaptively configured according to the initial water level.

[0052] The food processor of this embodiment is equipped with a detection plate for remote liquid level detection. Typically, the detection plate is equipped with multiple capacitor electrodes. This embodiment utilizes the principle of remote sensing, utilizing capacitor electrodes to remotely detect water level and overflow prevention signals. This allows the detection plate to replace existing protruding water level and overflow prevention electrodes located at different locations on the machine, achieving integrated food processor functionality and significantly reducing manufacturing costs. Furthermore, the food processor eliminates blind spots around the overflow prevention or water level electrodes, making cleaning more convenient and cleaner.

[0053] At the same time, the detection board is also provided with capacitor electrodes corresponding to multiple water level detection segments and multiple anti-overflow judgment positions, and different water level detection segments have corresponding anti-overflow judgment positions for detecting foam anti-overflow signals, and each of the multiple anti-overflow judgment positions is located above its corresponding water level detection segment. Therefore, compared to the existing food processing machine with only one fixed detection position and anti-overflow electrode, the food processing machine of this embodiment has multiple anti-overflow detection positions, that is, anti-overflow judgment positions. The multiple anti-overflow judgment positions can detect the height of the slurry or slurry foam layer by layer, which can completely avoid the problem of slurry overflow. Compared with the existing food processing machine with anti-overflow electrodes, the anti-overflow reliability of this embodiment is higher, and all the anti-overflow judgment positions are in a hidden state, so there is no problem of difficult cleaning for users.

[0054] At the same time, different overflow prevention judgment positions in this embodiment correspond to different water level detection sections. Therefore, compared to existing food processors, the range of pulping capacity of the food processor of this embodiment can be wider. Because for different pulping capacities (i.e., water level detection sections), each pulping capacity will have a separate overflow prevention judgment position for corresponding overflow prevention detection. Compared to the existing method of only having a highest and fixed overflow prevention electrode, the pulping process does not need to continuously heat the pulp to generate more foam to touch the overflow prevention electrode to generate an overflow prevention signal. Therefore, when pulping, the food processor of this embodiment does not have the problem of excessive power consumption, which not only effectively saves energy but also provides users with a wider range of pulping options, greatly improving the user experience.

[0055] Secondly, for the food processing machine of this embodiment, during the pulping process, the initial water level added to the glass container of the food processing machine for this pulping is first detected by the capacitor electrode at the bottom of the detection plate. Different initial water levels correspond to the same or different water level detection sections. According to the initial water level and the corresponding water level detection section, the capacitor electrode at the upper part of the detection plate corresponding to the anti-overflow signal is determined, and then the capacitor electrode at the upper part of the detection plate is used as the initial anti-overflow judgment position for this pulping to perform the pulping operation. It should be noted that the initial anti-overflow judgment position refers to the position where the anti-overflow signal is first detected during the pulping process. When no abnormality occurs during the entire pulping process, the slurry generates an anti-overflow signal at the position of the initial anti-overflow judgment position and performs anti-overflow operation control. When an adhesion abnormality occurs during the pulping process, even if the pulping operation is stopped, the slurry will continue to be detected at the initial anti-overflow judgment position and the anti-overflow signal is continuously generated, indicating that an adhesion abnormality exists at this time and the function of the initial anti-overflow judgment position to detect the anti-overflow signal has failed. In order to continue to complete the pulping operation, avoid production waste, and reduce unnecessary operation troubles for users, the food processor of this embodiment will adjust the new anti-overflow judgment position during the remaining pulping process. At this time, the new anti-overflow judgment position can not only solve the adhesion abnormality and ensure that the pulping operation can be completed, but also prevent the occurrence of pulp overflow.

[0056] In addition, for the food processor of this embodiment, during the pulping process, the main control will also configure the pulping program according to the initial water level for pulping. Therefore, the pulping control method of this embodiment can greatly improve the pulping efficiency. For example, during the low water level pulping process, the main control will automatically adjust the heating power or heating time in the pulping program to match the low water level pulping, thereby greatly shortening the pulping cycle and improving the intelligence of the product. Moreover, when pulping at a low water level, since the initial anti-overflow judgment position is also lowered along with the initial water level, the pulp foam generated by heating will not rise very high during pulping, thereby effectively avoiding problems such as pulp foam sticking to the wall, slag accumulation, and difficulty in cleaning or pulp foam adhesion.

[0057] In this embodiment, when the initial water level V detected by the detection plate is different, since the corresponding water level detection section may also be different, the corresponding pulping process will be different. The main relationship is as follows:

[0058] When the initial water level V is below the ultra-low water level detection section H0, that is, the initial water level V is lower than the lower limit of the ultra-low water level detection section H0, the detection board cannot detect the water level signal. At this time, the main control determines that the water level in the pulping chamber is lower than the first capacitor electrode L1, and determines that the pulping chamber is in a water-free or ultra-low water state. The main control alarm prompts the user to place the material according to the instructions.

[0059] When the initial water level V is within the ultra-low water level detection section H0, the first capacitor electrode L1 on the detection board can detect the water level signal. At this time, the initial water level V is located in the area detected by L1, and the main control determines that the initial water level V corresponds to the initial anti-overflow judgment position of pulping as F1 (specifically L5 or L6). The main control configures the corresponding pulping program according to the initial water level V to control the liquid heater to perform pulping.

[0060] When the initial water level V is within the low water level detection section H1, the first capacitor electrode L2 or L3 on the detection board can detect the water level signal. At this time, the initial water level V is located in the area detected by L2 and L3, and the main control determines that the initial water level V corresponds to the initial anti-overflow judgment position of pulping as F2 (i.e. L7). The main control configures the corresponding pulping program according to the initial water level V to control the liquid heater to perform pulping.

[0061] When the initial water level V is within the range of the middle water level detection section H2, when any one of the capacitor electrodes L4 to L6 on the detection board can detect the water level signal, at this time, the initial water level V corresponds to the detection area where L4 to L6 are located, and the main control determines that the initial water level V corresponds to the initial anti-overflow judgment position of pulping as F3 (specifically L8 or L9), and the main control configures the corresponding pulping program according to the initial water level V to control the liquid heater to perform pulping.

[0062] When the initial water level V is within the high water level detection section H3, L7 on the detection board can detect the water level signal. At this time, the initial water level V is located in the area detected by L7, and the main control determines that the initial water level V will also correspond to the initial anti-overflow judgment position of pulping as F3 (specifically L8 or L9). The main control configures the preset high water level pulping program according to the initial water level V to control the liquid heater for pulping.

[0063] When the initial water level V is within the range of the ultra-high water level detection section H4, L8 or L9 on the detection board can detect the water level signal, the main control determines that the water level in the pulping chamber is an ultra-high water level, and configures the preset ultra-high water level pulping program according to the initial water level V to control the liquid heater to perform pulping, wherein when pulping is performed with the preset ultra-high water level pulping program, the main control performs overflow prevention control at the overflow prevention temperature preset in the ultra-high water level pulping program to prevent slurry from overflowing during pulping. Specifically, since when the initial water level V is within the range of the ultra-high water level detection section H4, L8 or L9 on the detection board can detect the water level signal, and L9 is the topmost one of the multiple capacitor electrodes, that is, there is no other capacitor electrode above L9, and therefore, there is no capacitor electrode that can serve as the corresponding initial overflow prevention judgment position in this case. Based on this, in this case, the main control performs overflow prevention control at the overflow prevention temperature preset in the ultra-high water level pulping program, that is, the temperature detection element is used to perform overflow prevention control according to the overflow prevention temperature.

[0064] When the initial water level V is above the ultra-high water level detection section H4, that is, the initial water level V is higher than the upper limit of the ultra-high water level detection section H4, according to the full cup water level signal, the main control determines that the water level in the pulping chamber exceeds the upper limit of the liquid heater, and alarms to remind the user to place the material according to the instructions.

[0065] For this embodiment, the initial anti-overflow judgment position for pulping corresponding to different initial water levels is set on the second capacitor electrode, and the detection height of the second capacitor electrode is greater than the detection height of the first capacitor electrode. The inventors found through research that in the pulping process of the prior art, when the slurry is whipped or heated, bubbles, foam and other substances will rise on the surface of the slurry, and the capacitance value of the capacitor electrode sensing bubbles and foam fluctuates slightly, and the processing chip cannot accurately identify whether it is a parasitic capacitance or an actual anti-overflow signal. Therefore, in this embodiment, the detection height of the second capacitor electrode is set to be greater than that of the first capacitor electrode. In this way, when detecting the anti-overflow signal, the second capacitor electrode forming the anti-overflow judgment position has a larger sensing area, can obtain a larger fluctuating capacitance value, and achieve more accurate anti-overflow signal detection. Compared with the prior art, it can realize the detection of anti-overflow signals such as rising bubbles and foam, effectively solving the problem that the existing single type of capacitor electrode can only more accurately detect the water level but cannot effectively detect the anti-overflow signal, greatly reducing the safety risk of overflow of slurry such as bubbles and foam in the application process of the existing capacitive anti-overflow detection technology.

[0066] It should be noted that, for this embodiment, the detection height of each water level detection section can be set as needed and is not limited to the solution disclosed in this embodiment. It is understandable that the water level detection section and overflow prevention judgment position in this application all belong to the concepts of "range", "interval" and "region", and are not fixed values ​​or fixed points. At the same time, in this embodiment, it can also be set that the low water level detection section H1 is equivalent to the first water level detection section, the middle water level detection section H2 is equivalent to the second water level detection section, and the high water level detection section H3 is equivalent to the third water level detection section, wherein the second capacitor electrode L6 on the detection board is used as the initial water level detection of the second water level detection section (H2), and is reused as the overflow signal detection (i.e. F1) of the initial overflow prevention judgment position corresponding to the first water level detection section (H1). Similarly, L7 on the detection board is used as the initial water level detection of the third water level detection section (H3), and is reused as the overflow signal detection (i.e. F2) of the initial overflow prevention judgment position corresponding to the second water level detection section (H2), which can significantly improve the range of the pulping capacity of the food processing machine, and can ensure that there is a corresponding initial overflow prevention judgment position under each initial water level of pulping for overflow signal detection. Compared to existing technologies, this system can achieve a wider range of pulping capacity, meeting the pulping needs of one to multiple servings, significantly improving pulping efficiency, and providing a better taste than blended pulp drinks. Of course, the number of water level detection sections and overflow prevention positions can be changed according to needs.

[0067] It should be noted that the structure of the detection board of the present invention is not limited to the solution disclosed in this embodiment. For example, multiple capacitor electrodes of the same size or different sizes can also be set on the detection board. In one embodiment, the capacitor electrodes include a first capacitor electrode, a second capacitor electrode, and a third capacitor electrode, etc., which are arranged in sequence from bottom to top along the height direction of the detection board, wherein the first capacitor electrode is used to detect a first initial water level added to the glass container, and the second capacitor electrode is used to detect a first initial overflow prevention judgment position corresponding to the first initial water level. At the same time, the second capacitor electrode is also reused to detect a second initial water level added to the glass container, and the third capacitor electrode is used to detect a second initial overflow prevention judgment position corresponding to the second initial water level.

[0068] In one embodiment, the capacitor electrode includes a first capacitor electrode, a second capacitor electrode and a third capacitor electrode, which are arranged in sequence from bottom to top along the height direction of the detection plate. The first capacitor electrode is used to detect a first initial water level added to the glass container, the second capacitor electrode is used to detect a second initial water level added to the glass container, the lower end of the third capacitor electrode is used to detect a first initial anti-overflow judgment position corresponding to the first initial water level, and the upper end of the third capacitor electrode is used to detect a second initial anti-overflow judgment position corresponding to the second initial water level.

[0069] It should also be noted that in this embodiment, within 5 seconds after the user selects the function and starts the work, the main control needs to obtain the initial water level and configure the corresponding pulping program to make the slurry. Otherwise, the user may mistakenly judge it as a product problem, and the user experience will be reduced. At the same time, after adding water to the glass container, the liquid level will have problems such as shaking and bubbles, which will affect the accuracy and reliability of the capacitor electrode detection on the detection board, thereby causing the accuracy of the initial water level obtained by the main control to decrease. In order to make the initial water level obtained by the main control more accurate or closer to the actual amount of water added, this embodiment adopts the following method to obtain the initial water level:

[0070] After the user selects the function and starts working, the main control first obtains the static water level V1 detected by the detection board, and then drives the motor to stir to obtain the dynamic water level V2. The main control calculates the initial water level based on the difference between V1 and V2:

[0071] When |V2-V1|≤ΔV, the main control uses V2 as the initial water level; when |V2-V1|>ΔV, the main control uses (V2+V1) / 2 as the initial water level; ΔV is a preset value for the main control. To prevent the motor from stirring too vigorously and affecting the acquired data, and to enable the main control to obtain the initial water level more quickly and prevent the user from mistaking it for an abnormality, this embodiment requires the main control to drive the motor to stir at a speed not exceeding 5000 rpm for no more than 5 seconds, wherein the speed is preferably 3000 rpm and the stirring time is preferably 3 seconds.

[0072] After adding water to a glass container, bubbles and foam will form on the relatively static liquid surface. Using the detected static liquid level directly as the initial water level can easily lead to inaccurate detection. Using the above method, motor stirring can eliminate bubbles and foam, allowing the main control to obtain a more accurate initial water level. Before the pulping process is executed, the main control effectively and accurately identifies the initial water level, allowing for more accurate determination of the initial overflow prevention position and configuration of the optimal pulping process, thus optimizing pulping efficiency and significantly improving the user experience.

[0073] It should be noted that, in this embodiment, the main control is to adaptively configure different pulping programs according to different initial water levels for pulping, wherein configuring different pulping programs includes configuring different heating parameters and / or different crushing parameters, and the heating parameters include heating time and / or heating power, and the crushing parameters include crushing time and / or motor stirring power and / or motor speed. In one embodiment, during the boiling stage of pulping, the main control presets a heating power P0 corresponding to the lowest water level V0, and the main control adaptively configures different pulping programs according to different initial water levels, including the main control adaptively adjusting the corresponding heating power P according to the obtained initial water level V, wherein P=P0*(V0 / V). Different heating powers P can be used according to different initial water levels V, that is, the higher the pulping water level, the smaller the heating power P, and the lower the pulping water level, the greater the heating power P. In this way, for high water levels, due to the thermal inertia of the heating tube, reducing the heating power at high water levels can effectively prevent overflow and improve the safety of pulping. At the same time, for low water levels, since the overflow prevention position is farther from the cup mouth, the heating power can be increased during the boiling stage, achieving faster pulping, effectively shortening the pulping cycle, and improving pulping efficiency. Of course, for other pulping stages, different heating parameters can also be configured according to different initial water levels V to achieve safer, more efficient, and more reliable pulping.

[0074] In one embodiment, the main control presets a motor speed S0 corresponding to the minimum water level V0. The main control adaptively configures different pulping programs according to different initial water levels, including the main control adaptively adjusting the corresponding motor speed S = S0 + ΔS*(V0 / V) according to the obtained initial water level V, where ΔS is a preset constant, and ΔS will also adaptively select different preset constants according to the stage of the pulping program. For example, when the pulping is in the early pre-crushing stage, the preset constant of ΔS is 500rpm. When the pulping is in the high-speed crushing stage, the preset constant of ΔS is 1000rpm. If the calculated S is greater than the maximum speed of the motor, S is configured to execute according to the maximum motor speed. This can avoid the phenomenon of the motor running blank or even slurry splashing during pre-crushing or low water level pulping. At the same time, a better crushing effect can also be achieved when pulping at a high water level. Of course, if other crushing stages are set in the pulping program, ΔS can also be pre-set with different constants to match, and S will also be configured according to the corresponding ΔS.

[0075] In addition, the food processor of this embodiment also has a self-disposal function for abnormal adhesion. For example, when the food processor is at a low water level and the main control performs pulping operation with the initial anti-overflow judgment position A, when it detects that the slurry continuously generates anti-overflow signals at the initial anti-overflow judgment position A, the main control confirms that it is in an abnormal adhesion state. The main control will automatically and dynamically adjust the anti-overflow judgment position, and use the anti-overflow judgment position B (corresponding to the middle water level) above the adjacent anti-overflow judgment position A as the new anti-overflow judgment position to continue the pulping operation, and so on until the highest anti-overflow judgment position C. This solution, while protecting anti-overflow safety, does not interrupt the pulping program, ensuring that the pulping operation can be safely completed even in an abnormal state and improving the user experience.

[0076] It should be further noted that during the slurry boiling process, when it detects that the slurry continuously generates anti-overflow signals at the highest anti-overflow judgment position C, the main control confirms that it is in an abnormal adhesion state. The main control will configure heating parameters according to the current slurry temperature T to continue pulping. At this time, the main control presets an anti-overflow temperature Td at the current altitude. Among them, the relationship between T and Td is as follows: when T < Td - 10, the main control matches and continues to boil the slurry at a power of 1 / 2Pr; when Td - 10 ≤ T < Td - 5, the main control matches and boils the slurry at a power of 1 / 3Pr; when Td - 5 ≤ T < Td - 3, the main control heats the slurry at a power of 1 / 4Pr; when Td - 3 ≤ T, the main control stops heating; where Pr is the rated heating power of the heating tube, and the unit of temperature is Celsius. By automatically adjusting the heating parameters as described above, the main control can solve the slurry boiling in the abnormal adhesion state. At the same time, it is not easy to have the problem of slurry overflow, ensuring the smooth progress of pulping. Of course, in order to ensure the accuracy of the temperature sensor detecting the slurry temperature, during the boiling process, the main control can also control the motor to stir the slurry at a certain speed to achieve uniform temperature. For example, the motor operates at 3000 rpm, stirring for 3 seconds and stopping for 3 seconds.

[0077] Of course, for this embodiment, while using the low water level anti-overflow judgment position as the initial anti-overflow detection position, the anti-overflow judgment position of the adjacent upper position or the highest anti-overflow judgment position can also be used as a safe auxiliary anti-overflow detection position to ensure the anti-overflow safety of pulping.

[0078] It should also be noted that the arrangement of the capacitor electrodes of the detection board of the present invention is not limited to the solution disclosed in this embodiment. For example, as shown in the structure of Figure 4, a dividing groove 500 is provided on the detection board, and the dividing groove 500 divides the multiple second capacitor electrodes 52 into two parallel detection areas, and each second capacitor electrode 52 is divided into two side-by-side sub-electrodes by the dividing groove 500, and each sub-electrode after division is also electrically connected to the processing chip on the back of the detection board through a printed circuit, wherein the two triangles formed after the multiple second capacitor electrodes 52 are divided have equal areas, but at the same height, the detection areas of the two detection areas are not equal. In other words, the dividing groove 500 extends from the upper right corner of the multiple second capacitor electrodes 52 to the lower left corner, so that the multiple second capacitor electrodes 52 are divided into two triangles of equal area. It can be understood that for a single second capacitor electrode 52, the areas of the two detection areas divided by the dividing groove 500 are different. During overflow prevention detection, the processing chip obtains the cumulative value of the capacitance value increments detected by the two detection areas, and determines the current overflow prevention height based on the ratio of the cumulative values ​​of the two capacitance value increments. When the current overflow prevention height is at the preset overflow prevention judgment position, the main control configures the corresponding pulping parameters to perform subsequent pulping operations. The above-mentioned detection board structure and detection method can obtain a more accurate overflow prevention signal, which helps the normal progress of pulping, prevents the safety risk of slurry overflow, and significantly improves pulping efficiency. Of course, food processing machines equipped with this detection board can also use the pulping control method of the present invention to perform pulping operations.

[0079] It should be noted that the main control detects the initial water level based on the capacitor electrode at the bottom of the detection plate, and then searches for the capacitor electrode at the upper part of the detection plate corresponding to the anti-overflow signal based on the initial water level and the preset correspondence, and uses the capacitor electrode as the initial anti-overflow judgment position for this pulping to perform pulping operations. In this embodiment, the preset correspondence includes that the food processor is preset with multiple water level detection segments for detecting the initial water level, different water level detection segments have different detection heights, and the detection board has different capacitor electrodes corresponding to different water level detection segments, different water level detection segments have one-to-one corresponding different anti-overflow judgment positions, and the corresponding anti-overflow judgment positions are located above the corresponding water level detection segments, the water level detection segment in which this pulping is located is determined according to the initial water level, and then the corresponding initial anti-overflow judgment position is obtained according to the water level detection segment of this pulping. That is, the main control searches for the corresponding anti-overflow judgment position (corresponding to the capacitor electrode at the upper part of the detection plate) according to the water level detection section (corresponding to the capacitor electrode at the lower part of the detection plate) where the initial water level is located, and determines the capacitor electrode corresponding to the upper part of the detection plate as the initial anti-overflow judgment position for this pulping, thereby realizing anti-overflow control during the pulping process.

[0080] Of course, there are other ways to implement the pre-set correspondence relationship described above in this embodiment. For example, the pre-set correspondence relationship also includes the food processor having a preset height value, and the height of the capacitor electrode on the detection plate that detects the initial water level plus the preset height value corresponds to the capacitor electrode as the initial anti-overflow judgment position for this pulping. That is, when the main control recognizes that the capacitor electrode at the bottom of the detection plate detects the initial water level, it will find the capacitor electrode at the top of the detection plate used to detect the corresponding anti-overflow signal according to the pre-set corresponding logic and add the preset height value, and use the capacitor electrode at the top of the detection plate as the initial anti-overflow judgment position for this pulping, thereby also being able to find the correct anti-overflow judgment position for pulping anti-overflow control. Of course, the preset height value can be a fixed value. If the shape of the glass container is not a straight barrel, the anti-overflow height corresponding to each initial water level will be different. In this case, the preset height value can also be preset in the main control to change with the change of the initial water level, and may increase or decrease as the initial water level increases.

[0081] In addition, it should be noted that the liquid heater of the present invention is not limited to the food processor with an integrated motor and cup body disclosed in the embodiment of the present invention. It can also be a soymilk maker with an upper motor, a wall-breaking machine with a separate cup body and base, and a food processor that can achieve automatic pulp discharge and automatic cleaning without hand washing. Moreover, the food processor of the present invention can also be applied to heating appliances that can perform pulp boiling operations, rice paste making, etc., such as water kettles, health pots, and health pots.

[0082] Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A pulping control method for a liquid heater with air detection, wherein the liquid heater comprises a glass container, and a strip-shaped detection plate is arranged on the outer wall of the glass container, and the detection plate is provided with a plurality of capacitor electrodes for air detection of water and foam along the height direction, characterized in that: The detection height of a single capacitor electrode for detecting foam is greater than the detection height of a single capacitor electrode for detecting water. The different capacitor electrodes on the upper part of the detection plate are used as overflow prevention judgment positions for detecting different foam heights. The initial water level added to the glass container by the liquid heater during this pulping is detected by the capacitor electrode on the lower part of the detection plate. According to the initial water level and the pre-set corresponding relationship, the capacitor electrode on the upper part of the detection plate corresponding to the foam detection is determined, and the capacitor electrode on the upper part of the detection plate is used as the initial overflow prevention judgment position for this pulping to perform pulping operations.

2. The pulping control method according to claim 1, characterized in that: The preset corresponding relationship includes pre-setting a plurality of water level detection segments for detecting the initial water level, different water level detection segments have different detection heights, and the detection plate has different capacitor electrodes corresponding to different water level detection segments, different water level detection segments have corresponding anti-overflow judgment positions, and the corresponding anti-overflow judgment positions are located above the corresponding water level detection segments, the water level detection segment in which the current pulping is located is determined according to the initial water level, and then the corresponding initial anti-overflow judgment position is obtained according to the water level detection segment in which the current pulping is located.

3. The pulping control method according to claim 1, characterized in that: The preset corresponding relationship includes a preset height value, and the capacitor electrode corresponding to the height of the capacitor electrode detected at the initial water level on the detection board plus the preset height value is used as the initial anti-overflow judgment position for this pulping.

4. The pulping control method according to claim 1, characterized in that: Get the initial water level within 5 seconds after the user selects the function and starts working.

5. The pulping control method according to claim 1, characterized in that: The liquid heater performs pulping operation according to a pulping program adaptively configured according to the initial water level, wherein the pulping program configuration includes configuration of different heating parameters and / or different crushing parameters, the heating parameters include heating time and / or heating power, and the crushing parameters include crushing time and / or motor stirring power and / or motor speed.

6. The pulping control method according to claim 2, characterized in that: The water level detection section includes an ultra-low water level detection section, a low water level detection section, a middle water level detection section and a high water level detection section, and the initial overflow prevention judgment position includes an ultra-low water level overflow prevention judgment position, a low water level overflow prevention judgment position and a middle-high water level overflow prevention judgment position, and the pulping control method also includes: When the initial water level is within the ultra-low water level detection range, the initial overflow prevention judgment position corresponding to the initial water level is obtained as the ultra-low water level overflow prevention judgment position; When the initial water level is within the low water level detection range, the initial overflow prevention judgment position corresponding to the initial water level is obtained as the low water level overflow prevention judgment position; When the initial water level is within the range of the middle water level detection section or the range of the high water level detection section, the initial overflow prevention judgment position corresponding to the initial water level is obtained as the middle-high water level overflow prevention judgment position.

7. The pulping control method according to claim 6, characterized in that: The pulping control method further comprises: when the initial water level is below the ultra-low water level detection section, judging that there is no water or the water level is ultra-low in the glass container, and controlling the liquid heater to give an alarm prompt; Alternatively, the water level detection section also includes an ultra-high water level detection section, and the pulping control method also includes: when the initial water level is within the range of the ultra-high water level detection section, configuring an ultra-high water level pulping program to perform pulping, and performing overflow prevention control according to the overflow prevention temperature preset in the ultra-high water level pulping program; when the initial water level is above the ultra-high water level detection section, judging that the glass container has an ultra-high water level, and controlling the liquid heater to alarm.

8. The pulping control method according to claim 1 or 5, characterized in that: The pulping operation is carried out according to a pulping program configured adaptively according to the initial water level. The configured pulping program includes adaptively adjusting the corresponding heating power P = P0*(V0 / V) according to the obtained initial water level V, where V0 is the preset lowest water level and P0 is the heating power corresponding to the preset lowest water level V0. Alternatively, the pulping operation is carried out according to a pulping program configured adaptively according to the initial water level. The configured pulping program includes adaptively adjusting the corresponding motor speed S = S0 + ΔS*(V0 / V) according to the obtained initial water level V, where V0 is the preset lowest water level, S0 is the motor speed corresponding to the preset lowest water level V0, and ΔS is a preset constant.

9. The pulping control method according to claim 1, characterized in that: The capacitor electrode plate includes a first capacitor electrode, a second capacitor electrode plate, and a third capacitor electrode plate arranged in sequence from bottom to top along the height direction of the detection plate. The first capacitor electrode plate is used to detect the first initial water level added into the glass container. The second capacitor electrode plate is used to detect the first initial overflow prevention judgment position corresponding to the first initial water level. And the second capacitor electrode plate is also used to detect the second initial water level added into the glass container, and the third capacitor electrode plate is used to detect the second initial overflow prevention judgment position corresponding to the second initial water level.

10. The pulping control method according to claim 1 or 4, characterized in that: It further includes: After the user selects a function and starts working, first obtain the static water level V1, then drive the motor to stir to obtain the dynamic water level V2, and then calculate the initial water level according to the difference between V1 and V2: When |V2 - V1| ≤ ΔV, use V2 as the initial water level; When |V2 - V1| > ΔV, use (V2 + V1) / 2 as the initial water level; where ΔV is a preset value.

11. The pulping control method according to claim 1, characterized in that: During the pulping operation, when it is detected that the slurry continuously generates an overflow signal at the initial overflow prevention judgment position, it is confirmed that the slurry is in an abnormal adhesion state, and the overflow prevention judgment position is dynamically adjusted, and the overflow prevention judgment position above the initial overflow prevention judgment position is used as the new overflow prevention judgment position to continue the pulping operation.

12. The pulping control method according to claim 11, characterized in that: It further includes: The overflow prevention judgment position includes the highest overflow prevention judgment position. During the boiling process of the slurry, when it is detected that the slurry continuously generates an overflow signal at the highest overflow prevention judgment position, it is confirmed that the slurry is in an abnormal adhesion state, and the heating parameters are configured according to the current slurry temperature T to continue the boiling operation.

13. The pulping control method according to claim 12, characterized in that: There is also a preset overflow prevention temperature Td corresponding to the current altitude, and the relationship between T and Td is as follows: When T < Td - 10, heat the slurry at 1 / 2Pr power; When Td - 10 ≤ T < Td - 5, heat the slurry at 1 / 3Pr power; When Td - 5 ≤ T < Td - 3, heat the slurry at 1 / 4Pr power; When Td - 3 ≤ T, stop heating; where Pr is the rated heating power of the heating tube.

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