CN114052534B - Control method of food processing machine - Google Patents
Control method of food processing machine Download PDFInfo
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- CN114052534B CN114052534B CN202010748066.4A CN202010748066A CN114052534B CN 114052534 B CN114052534 B CN 114052534B CN 202010748066 A CN202010748066 A CN 202010748066A CN 114052534 B CN114052534 B CN 114052534B
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- cup body
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/07—Parts or details, e.g. mixing tools, whipping tools
- A47J43/075—Safety devices
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The embodiment of the application discloses a control method of a food processor, which comprises the following steps: a cup body and a heating device; the bottom of the cup body is provided with a temperature sensor; the method comprises the following steps: after the pulping function is started, judging whether materials exist in the cup body according to the bottom temperature of the cup body; stopping heating when the cup body is judged to be free of materials, and sending a material-free prompt; when the material is judged to be in the cup body, the heating temperature difference delta T1 is obtained according to the bottom temperature of the cup body and the preset first lowest water level line Mixing of The size relationship of the cup body determines whether to judge the material once or more times so as to determine whether the material amount in the cup body meets the pulping requirement. Through the scheme of the embodiment, the effective detection of the existence of materials is realized, so that anhydrous dry burning is avoided, the cost is reduced, the user experience is improved, and the reliability and the safety of the machine are improved.
Description
Technical Field
The present disclosure relates to food processing machines, and more particularly to a control method for a food processing machine.
Background
The current food preparation machine (such as soybean milk machine) adopts the non-isolated power scheme, does not have weak current part, can't detect whether there is water in the cup through water level electrode discernment, and the heating pipe implements through configuration fuse-link and temperature controller and prevents dry combustion method protection, and when the user did not place the material and selects the start-up function, the machine was carried out according to the slurrying flow, had following problem when continuously heating:
1. the temperature controller is disconnected due to continuous heating, and poor user experience is caused due to delayed alarm;
2. due to the fact that temperature measurement of the temperature controller is inaccurate due to the difference between the precision of the temperature controller and the installation and attachment position, the fuse link has the risk of being disconnected before the temperature controller, the machine cannot work normally, and user experience is poor;
3. because the temperature measurement is inaccurate due to the precision of the temperature controller and the fuse link and the difference of the installation and joint positions, the machine is not dried and can not be effectively protected, and the safety risk exists;
4. the cost of the temperature controller is far higher than that of the fuse link, and the cost of the whole machine is increased.
Disclosure of Invention
The embodiment of the application provides a control method of a food processor, which can realize effective detection of the existence of materials, thereby effectively avoiding dry burning, improving the reliability and safety of the machine, improving the intelligent degree of the machine and improving the user experience.
An embodiment of the present application provides a control method of a food processor, where the food processor may include: a cup body and a heating device; a temperature sensor is arranged at the bottom of the cup body; the method may include:
after the pulping function is started, judging whether materials exist in the cup body according to the bottom temperature of the cup body;
stopping heating when the cup body is judged to be free of materials, and sending a material-free prompt; when the material is judged to be in the cup body, the heating temperature difference delta T1 is obtained according to the bottom temperature of the cup body and the preset first lowest water level line Mixing of The size relationship of the cup body determines whether to judge the material once or more times so as to determine whether the material amount in the cup body meets the pulping requirement.
In an exemplary embodiment of the present application, the determining whether there is a material in the cup body according to the bottom temperature of the cup body may include:
controlling the heating device to heat for a first preset time period t1 by adopting a first preset heating power P1, and detecting the bottom temperature of the cup body in real time through the temperature sensor;
calculating a first temperature difference value delta T1 between a first bottom temperature T1 detected at the initial moment after the pulping function is started and a second bottom temperature T2 detected after the first preset time period T1 is reached;
according to the first temperature difference value delta T1 and a preset temperature difference threshold value T g The size relationship of (2) judges whether the cup body contains materials.
In an exemplary embodiment of the present application, said first temperature difference value Δ T1 is based on a preset temperature difference threshold T g Judging whether the material exists in the cup body or not according to the size relationThe method can comprise the following steps: when DeltaT 1 is more than or equal to T g Judging that no material exists in the cup body; when Δ T1<T g And judging that the cup body contains the material.
In an exemplary embodiment of the present application, the food processor may further include: a fuse link;
the method may further comprise: according to the first temperature difference value delta T1 and a preset temperature difference threshold value T g Before judging whether the material exists in the cup body or not according to the size relation of the temperature difference, the rated power P of the heating device is used 0 And the fusing temperature T of the fuse link Fusion furnace Calculating the first preset time T1 and the temperature difference threshold value T g 。
In an exemplary embodiment of the application, said power rating P according to said heating means 0 And/or the fusing temperature T of the fuse link Fusion furnace Calculating the first preset time T1 and the temperature difference threshold value T g The method can comprise the following steps:
T g ＝(T fusion furnace -T 0 )/2；T 0 The normal temperature of the current environment;
t1＝(σ cup with elastic band *C Cup with elastic band *m Cup with elastic band *T g )/P 0 ；σ Cup (Ref. Now to FIGS) Is the thermal conductivity of the cup body, C Cup with elastic band Is the specific heat capacity of the cup body, m Cup with elastic band Is the mass of the cup body.
In an exemplary embodiment of the present application, the bottom temperature of the cup body is a first temperature difference value Δ T1 between a first bottom temperature T1 detected at an initial time after the pulping function is started and a second bottom temperature T2 detected after heating for a first preset time period T1 with a first preset heating power P1;
according to the first temperature difference value delta T1 and a preset first lowest water level line heating temperature difference value delta T1 Mixing of Determining whether to make one or more further material determinations may include:
when Δ T1<ΔT1 Mixing of Judging the amount of materials meeting the pulping requirement placed in the cup body, and entering a normal pulping process;
when Δ T1 Mixing of ≤△T1<T g And judging the amount of a small amount of materials which cannot meet the pulping requirement placed in the cup body, and judging the materials once or many times.
In an exemplary embodiment of the present application, the food processor may further comprise a motor; the performing one or more material determinations again may include:
controlling the heating device to heat a second preset time period T2 by adopting a second preset heating power P2, and calculating a second lowest water level line heating temperature difference value delta T2 according to the second preset heating power P2 and the second preset time period T2 Mixing of ；
Within the second preset time period t2, driving the motor to intermittently work at a set rotating speed S;
after the second preset time period T2 is reached, detecting a third bottom temperature T3 through the temperature sensor, and calculating a second temperature difference value Δ T2 between the third bottom temperature T3 and the second bottom temperature T2;
the second temperature difference value delta T2 and the second lowest water level line heating temperature difference value delta T2 are compared Mixing of Comparing, and judging whether the material amount in the cup body meets the pulping requirement according to the comparison result;
wherein, judge whether the material volume satisfies the slurrying requirement in the cup according to the comparative result includes:
when DeltaT 2 is more than or equal to DeltaT 2 Mixing of When the cup is used, judging that a small amount of materials which cannot meet the pulping requirement are placed in the cup body, stopping heating and giving a material-free prompt;
when Δ T2<ΔT2 Mixing of And judging the amount of the materials meeting the pulping requirement placed in the cup body, and entering a normal pulping process.
In an exemplary embodiment of the present application, the second preset heating power P2 is different from the first preset heating power P1, and the first preset heating power P1 is a magnitude according to a rated power P of the heating device 0 Determining the size of the target; and/or the presence of a gas in the gas,
the second preset time period t2 is different from the first preset time period t1, and the first time periodThe preset time T1 is according to the temperature difference threshold value T g Determining; and the second preset time t2 is determined according to the size relation between the working time and/or the pause time of each time when the motor works intermittently and the heating time calculated according to the law of conservation of energy.
In an exemplary embodiment of the present application, the first preset heating power P1 is of a magnitude according to a rated power P of the heating device 0 The size determination of (2) comprises:
when P is present 0 When the weight is more than or equal to 1000W, P1= P 0 /3；
When 500W is less than or equal to P 0 <1000W, P1= P 0 /2；
When P is present 0 <500W，P1＝P 0 。
In an exemplary embodiment of the present application, the method may further include:
under the condition of continuous pulping of the food processor, before each continuous pulping, detecting a fourth bottom temperature T4 of the cup body, controlling the heating device to heat for a third preset time T3, and then detecting a fifth bottom temperature T5 of the cup body; calculating a third temperature difference value delta T3 between the fourth bottom temperature T4 and the fifth bottom temperature T5, and judging whether to enter a dry burning control process according to the magnitude relation between the third temperature difference value delta T3 and a preset temperature value;
wherein the preset temperature value is the normal temperature T of the current environment 0 And a set temperature T n And (4) summing.
In an exemplary embodiment of the present application, the method may further include:
after the fact that no material exists in the cup body is judged, the temperature difference threshold T is reached according to the first temperature difference value delta T1 in the dry burning prevention control process g And adjusting the first preset time t1 according to the size relation between the time duration and the first preset time t1.
The food processor of the embodiment of the application can comprise: a cup body and a heating device; the bottom of the cup body is provided with a temperature sensor; the method can comprise the following steps: after the pulping function is started, judging whether the inside of the cup body is the pulp making cup body according to the bottom temperature of the cup bodyWhether materials exist or not; stopping heating when the cup body is judged to be free of materials, and sending a material-free prompt; when the material is judged to be in the cup body, the heating temperature difference delta T1 is obtained according to the bottom temperature of the cup body and the preset first lowest water level line Mixing of The size relationship of the cup body determines whether to judge the material once or more times so as to determine whether the material amount in the cup body meets the pulping requirement. Through this embodiment scheme, realized having the effective discernment of material in the cup to effectively avoided anhydrous dry combustion method, the cost is reduced, improved user experience, promoted machine reliability and security.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a flow chart of a control method of a food processor according to an embodiment of the present application;
FIG. 2 is a front view of a temperature sensor according to an embodiment of the present application;
fig. 3 is a top view of a temperature sensor arrangement according to an embodiment of the present application.
Detailed Description
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
An embodiment of the present application provides a control method of a food processor, where the food processor may include: a cup body and a heating device; the bottom of the cup body is provided with a temperature sensor; as shown in fig. 1, the method may comprise steps S101-S104:
s101, judging the cup body according to the bottom temperature of the cup body after the pulping function is startedWhether materials exist in the container or not; s104, stopping heating when the cup body is judged to be free of the materials, and sending a material-free prompt; when the material is judged to be in the cup body, the heating temperature difference delta T1 is obtained according to the bottom temperature of the cup body and the preset first lowest water level line Mixing of The size relationship of the cup body determines whether to judge the material once or more times so as to determine whether the material amount in the cup body meets the pulping requirement.
In the exemplary embodiment of the present application, as shown in fig. 2 and 3, the heating device 2 of the food processor may be disposed at the bottom or the side of the cup body 1, the temperature sensor 3 may be disposed at the cold end position of the heating device 2, and the temperature sensor 3 may be in full contact with the metal portion of the cup body 1.
In the exemplary embodiment of this application, through temperature sensor 3's position setting, temperature sensor 3 and the metal part full contact of cup 1 to and temperature sensor 3 is close to heating device 2 position, guaranteed that heating device 2's heat in time conducts temperature sensor 3 fast, guaranteed that temperature sensor 3 detects the temperature and corresponds with heating device's temperature, guaranteed that the material has or not effectively detected, and avoid anhydrous dry combustion method.
In the exemplary embodiment of this application, the temperature of slurrying in-process heating device 2 is far above the thick liquid temperature in 1 cup, arrange heating device 2's cold junction position in through temperature sensor 3, the slurrying in-process has been avoided, heating device's heat causes temperature sensor 3 to detect the thick liquid temperature and leads to the erroneous judgement with actual thick liquid temperature inconsistent, thereby both guaranteed that temperature sensor 3 detects the temperature accuracy, guaranteed again to prevent dry combustion method to detect quick effectively, the reliability of machine has been promoted, user experience has been improved.
In an exemplary embodiment of the present application, the determining whether there is a material in the cup body according to the bottom temperature of the cup body may include:
controlling the heating device to heat for a first preset time t1 by adopting a first preset heating power P1, and detecting the bottom temperature of the cup body in real time through the temperature sensor;
calculating a first temperature difference value delta T1 between a first bottom temperature T1 detected at the initial moment after the pulping function is started and a second bottom temperature T2 detected after the first preset time period T1 is reached;
according to the first temperature difference value delta T1 and a preset temperature difference threshold value T g The size relationship of (2) judges whether the cup body contains materials.
In an exemplary embodiment of the present application, said first temperature difference value Δ T1 is based on a preset temperature difference threshold T g The determining whether the material exists in the cup body may include: when DeltaT 1 is more than or equal to T g Judging that no material exists in the cup body; when Δ T1<T g And judging that the cup body contains the material.
In an exemplary embodiment of the application, the temperature sensor of the present embodiment may be placed at the bottom of the cup body, the shell of the temperature sensor may be in full contact with the cup body, and under the conditions of the set heating power (the first preset heating power P1 as described above) and the set heating time (the first preset heating time t1 as described above), the machine may be identified and judged whether the machine is dry-burned or not by using the obvious difference between the temperature difference between the dry-burned cup body and the material placed in the cup body.
In the exemplary embodiment of the present application, after the user selects the start function, the initial temperature T1 (i.e., the first bottom temperature T1) may be detected by the in-cup temperature sensor and the in-cup temperature may be detected in real time, and the heating may be performed according to the set heating power P1.
In the exemplary embodiment of the present application, after the heating is performed for the set time period T1, the temperature of the temperature sensor is detected as T2 (i.e., the second bottom temperature T2), the temperature difference value detected by the temperature sensor (i.e., the first temperature difference value) is Δ T1= T2-T1, and the temperature difference value Δ T1 and the threshold value T of the temperature difference between the cup body and the cup body for dry burning can be determined g And (4) comparison and judgment:
when Δ T is not less than T g When the cup is used, the user is judged not to place water, namely, no material exists in the cup body, the heating can be stopped, and the user is warned to place the material;
when Δ T<T g When the cup is used, the user is judged to have placed water, namely, the cup body is filled with materials; the next phase (which may be referred to as the second decision phase, current) may be enteredStage may be referred to as a first decision stage) to decide to further confirm.
In the exemplary embodiment of this application, under the condition that the temperature sensor of this embodiment scheme cup bottom and cup are complete to contact, utilize when the cup has water or anhydrous, heating device dry combustion method or heating device conduct the heat difference of temperature sensor on the cup in setting for time duration when heating water different, utilize the temperature difference that detects temperature sensor to carry out the comparison judgement with the settlement threshold value and realize preventing dry combustion method effectively to detect, reliability and security that has promoted the machine, the intelligent degree of machine has been promoted, user experience has been improved.
In the exemplary embodiment of the application, the anti-dry heating is detected and identified by the temperature sensor at the bottom of the cup body, and the fuse body heating and controlling device arranged at the position of the cup body heating device can be replaced by a double fuse body, so that the cost of the whole machine is reduced.
In an exemplary embodiment of the present application, the food processor may further include: a fuse link;
the method may further comprise: according to the first temperature difference value delta T1 and a preset temperature difference threshold value T g Before judging whether the material exists in the cup body or not according to the size relation of the temperature difference, the rated power P of the heating device is used 0 And the fusing temperature T of the fuse link Fusion furnace Calculating the first preset time T1 and the temperature difference threshold value T g 。
In an exemplary embodiment of the application, said power rating P according to said heating means 0 And/or the fusing temperature T of the fuse link Fusion furnace Calculating the first preset time T1 and the temperature difference threshold value T g The method can comprise the following steps:
T g ＝(T fusion furnace -T 0 )/2；T 0 The normal temperature of the current environment;
t1＝(σ cup with elastic band *C Cup with elastic band *m Cup with elastic band *T g )/P 0 ；σ Cup (Ref. Now to FIGS) Is the thermal conductivity of the cup body, C Cup with elastic band Is the specific heat capacity of the cup body, m Cup with elastic band Is the mass of the cup body.
In exemplary embodiments of the present application, the root may beDetermining heating time length and temperature difference threshold value (such as the first preset time length T1 and the temperature difference threshold value T) according to the power of the heating device and the parameters of the fuse link g )。
In an exemplary embodiment of the application, the food processor may be based on the power rating P of the heating device 0 Matching the corresponding fuse link fusing temperature parameter T Melting Temperature difference threshold T of food processor under anhydrous dry-heating condition g Can be selected as T g ＝(T Fusion furnace -T 0 )/2，T 0 Is the initial temperature under the normal temperature environment;
the heating time of the food processor under the condition of no water dry heating can be calculated according to the law of energy conservation (such as a first preset time t 1): p × t = σ Cup with elastic band *C Cup (Ref. Now to FIGS) *m Cup with elastic band *ΔT Cup with elastic band →
t＝(σ Cup with elastic band *C Cup (Ref. Now to FIGS) *m Cup with elastic band *ΔT Cup with elastic band )/P→t1＝(σ Cup with elastic band *C Cup with elastic band *m Cup with elastic band *T g )/P 0 ；
In an exemplary embodiment of the present application, the temperature difference threshold T may be set before the machine leaves the factory g And the first preset time t1 is stored in the main control.
In an exemplary embodiment of the present application, the temperature difference threshold T is set g The setting is half of the fuse link parameter difference, so that the problem that the machine is abnormal due to the fact that the temperature of the heating device is too high to exceed the fusing temperature parameter of the thermal fuse link due to the thermal inertia of the heating device, particularly a high-power heating device when the machine stops heating after dry burning judgment is avoided.
In an exemplary embodiment of the present application, the temperature difference threshold T is set g The parameter difference value of the fuse link is set to be half of the parameter difference value of the fuse link, so that the enough temperature rise time of dry burning judgment is ensured, and the failure of dry burning detection judgment caused by the insufficient dry burning prevention time period is avoided.
In an exemplary embodiment of the present application, the heating power at the setting (e.g., the rated power P) is calculated according to the law of conservation of energy 0 ) And temperature difference threshold value T g Obtaining the heating time under the condition of no water dry heating, and setting the time to ensure the enough temperature difference detected by the temperature sensor and avoid detectionThe measuring time is too long, the effectiveness of dry burning prevention detection is guaranteed, the service life of the machine is guaranteed, and the user experience is improved.
In the exemplary embodiment of the present application, the dry burning prevention determination may be divided into two determination stages, and different control determination manners may be configured in different determination stages.
In an exemplary embodiment of the present application, the method may further include: when the material is judged to be in the cup body, before the material is judged once or more times again, the heating temperature difference delta T1 is obtained according to the bottom temperature (such as the first temperature difference delta T1) of the cup body and the preset first lowest water level line Mixing of The magnitude relationship of (a) determines whether to make one or more material determinations again.
In the exemplary embodiment of the present application, at the first judgment stage, when Δ T1<T g Then, the heating temperature difference delta T1 can be set according to the temperature difference and the set first lowest water level line Mixing of Whether the second judgment stage is entered or not is determined by comparison, and the specific scheme is as follows.
In an exemplary embodiment of the present application, the heating temperature difference Δ T1 according to the first temperature difference Δ T1 and a preset first minimum water level line Mixing of Determining whether to make one or more further material determinations may include:
when Δ T1<ΔT1 Mixing of Judging the amount of materials meeting the pulping requirement placed in the cup body, and entering a normal pulping process;
when Δ T1 Mixing of ≤△T1<T g And judging the amount of a small amount of materials which cannot meet the pulping requirement placed in the cup body, and judging the materials once or many times.
In an exemplary embodiment of the present application, a heating temperature difference Δ T1 when the cup material is placed at the lowest water level may be previously stored Mixing of ：P1*t1＝σ Mixing of *C Mixing of *m Mixing of *ΔT1 Mixing of →ΔT1 Mixing of ＝(P1*t1)/(σ Mixing of *C Mixing of *m Mixing of )；
When Δ T1<ΔT1 Mixing of When the machine is placed, the machine can be judgedPutting a proper amount of materials and entering a normal pulping process.
When Δ T1 Mixing of <△T1<T g In time, the machine can be judged to place a small amount of material and the second judgment stage is entered.
In an exemplary embodiment of the present application, the food processor may further comprise a motor; the performing one or more material determinations again may include:
controlling the heating device to heat a second preset time period T2 by adopting a second preset heating power P2, and calculating a second lowest water level line heating temperature difference value delta T2 according to the second preset heating power P2 and the second preset time period T2 Mixing of ；
Within the second preset time period t2, driving the motor to intermittently work at a set rotating speed S;
after the second preset time period T2 is reached, detecting a third bottom temperature T3 through the temperature sensor, and calculating a second temperature difference value Δ T2 between the third bottom temperature T3 and the second bottom temperature T2;
the second temperature difference value delta T2 and the second lowest water level line heating temperature difference value delta T2 are compared Mixing of Comparing, and judging whether the material amount in the cup body meets the pulping requirement according to the comparison result;
wherein, judge whether the material volume satisfies the slurrying requirement in the cup according to the comparative result includes:
when DeltaT 2 is more than or equal to DeltaT 2 Mixing of When the cup is used, judging that a small amount of materials which cannot meet the pulping requirement are placed in the cup body, stopping heating and giving a material-free prompt;
when Δ T2<ΔT2 Mixing of And judging the amount of the materials meeting the pulping requirement placed in the cup body, and entering a normal pulping process.
In the exemplary embodiment of the present application, in the second determination stage, the heating power and the heating time period may be set as a second preset heating power P2 and a second preset time period T2, respectively, and the heating temperature difference Δ T2 when the cup material is placed at the lowest water level line may be stored in advance Mixing of ：P2*t2＝σ Mixing of *C Mixing of *m Mixing of *ΔT2 Mixing of →ΔT2 Mixing of ＝(P2*t2)/(σ Mixing of *C Mixing of *m Mixing of )。
In an exemplary embodiment of the present application, after the heating device is started to operate, the motor may be driven to intermittently operate at the set rotation speed S (stop N seconds per N seconds of operation) for a second preset heating time period T2, and after the second preset heating time period T2 is reached, the temperature T3 of the temperature sensor (i.e., the third bottom temperature T3) may be detected, the temperature difference value detected by the temperature sensor (i.e., the second temperature difference value Δ T2) is Δ T2= T3-T2, and the temperature difference value Δ T2 is compared with the set lowest water level line heating temperature difference value Δ T2 Mixing of And (4) comparison and judgment:
when Δ T2 is not less than Δ T2 Mixing of When the material quantity is too small, stopping heating, and giving an alarm to prompt the user to place the required material quantity;
when Δ T2<ΔT2 Mixing of In time, the proper amount of material placed by the machine can be determined and the normal pulping process can be entered.
In the exemplary embodiment of the application, the food processor can divide the dry burning prevention judgment into two judgment stages, the two states of no water and water can be effectively distinguished through the judgment of the first judgment stage, and the misjudgment risk caused by inaccurate temperature measurement due to the fact that a temperature sensor is wrapped and other factors exist in the judgment process can be avoided through the judgment of the second judgment stage.
In an exemplary embodiment of the present application, the heating temperature difference Δ T1 is set by placing the storage cup material at the lowest water level Mixing of The judgment threshold value used for judging whether the cup body enters the second judgment stage realizes effective distinguishing of the range of the material quantity placed in the cup body, reduces the risk of misjudgment, improves the judgment accuracy and improves the user experience.
In the exemplary embodiment of the application, the material temperature equalization in the cup and the detection accuracy of the temperature sensor are realized by setting an intermittent stirring mode at the second judgment stage, so that the range of the amount of the placed material can be effectively confirmed and distinguished, the intelligent degree of the whole machine is improved, and the user experience is improved.
In the exemplary embodiment of the present application, different heating powers and heating periods may be set according to different determination stages.
In an exemplary embodiment of the present application, the second preset heating power P2 is different from the first preset heating power P1, and the first preset heating power P1 is a magnitude according to a rated power P of the heating device 0 Determining the size of the cell; and/or the presence of a gas in the gas,
the second preset time T2 is different from the first preset time T1, and the first preset time T1 is according to the temperature difference threshold value T g Determining; and the second preset time t2 is determined according to the size relation between the working time and/or the pause time of each time when the motor works intermittently and the heating time calculated according to the law of conservation of energy.
In an exemplary embodiment of the present application, different heating powers are set according to different heating phases, and in the first judging phase, the selected heating power may be determined by the rated power P of the heating device 0 And (6) determining.
In an exemplary embodiment of the present application, the first preset heating power P1 is of a magnitude according to a rated power P of the heating device 0 The size determination of (a) may include:
when P is present 0 When the weight is more than or equal to 1000W, P1= P 0 /3；
When 500W is less than or equal to P 0 <1000W, P1= P 0 /2；
When P is present 0 <500W，P1＝P 0 。
In an exemplary embodiment of the present application, in the second determination stage, since the material is determined to be present in the cup body in the first determination stage, the selected heating power may be the rated power P of the heating device 0 。
In the exemplary embodiment of the application, because in the first judgment stage, the food processor cannot determine whether the cup body has the material, when the cup body does not have the material, the risk that the fuse link is damaged by dry burning to cause machine abnormality exists by adopting high-power heating, the heating power which is correspondingly detected and judged is matched according to the rated power of the heating device configured on the machine, the effective detection of whether the machine is dry burning is ensured, the reliability of the machine is improved, and the user experience is improved.
In the exemplary embodiment of the application, because the material in the cup body is judged in the first judgment stage, the machine is configured with rated power for heating in the second judgment stage, the detection time is shortened, the whole pulping period is prevented from being influenced by dry burning prevention detection, and the user experience is improved.
In the exemplary embodiment of the present application, different heating time periods may be set according to different heating stages, and the specific scheme may be as follows.
In the exemplary embodiment of the present application, different heating durations are set according to different determination stages, and in the first determination stage, the selected heating duration can be determined by the cup body dry-burning temperature difference threshold T g Determining:
P*t＝σ cup (Ref. Now to FIGS) *C Cup with elastic band *m Cup with elastic band *ΔT Cup (Ref. Now to FIGS) →ΔT Cup with elastic band ＝P*t/(σ Cup with elastic band *C Cup with elastic band *m Cup with elastic band )；
ΔT Cup with elastic band ≥T g →P*t/(σ Cup with elastic band *C Cup with elastic band *m Cup with elastic band )≥T g →t1≥σ Cup with elastic band *C Cup with elastic band *m Cup with elastic band *T g /P1；
The heating time of the first decision phase can therefore be selected to be σ Cup with elastic band *C Cup with elastic band *m Cup with elastic band *T g /P。
In the exemplary embodiment of the present application, in the second judging stage, since the material is judged to be present in the cup body in the first judging stage, Δ T2 may be set Mixing of ≥T n ，T n May be set at 8 deg.C-12 deg.C, and may be selected to be 10 deg.C, for example.
ΔT2 Mixing of ＝(P2*t2)/(σ Mixing of *C Mixing of *m Mixing of )→(P2*t2)/(σ Mixing of *C Mixing of *m Mixing of )≥T n
→t2≥(σ Mixing of *C Mixing of *m Mixing of )*T n /P2；
The motor can work at a set rotating speed S for N seconds and stop for N seconds, and the second preset heating time t2 is more than or equal to 2 x N seconds;
when ((sigma.)) Mixing of *C Mixing of *m Mixing of )*T n /P2)>2 × n, the heating duration of the second determination stage (i.e. the second preset heating duration t 2) may be selected as (σ n Mixing of *C Mixing of *m Mixing of )*T n /P2；
When ((sigma.)) Mixing of *C Mixing of *m Mixing of )*T n P2) is less than or equal to 2 × n, the heating time t2 of the second determination stage may be selected to be 2 × n seconds.
In the exemplary embodiment of the application, in the first judgment stage, the machine cannot determine whether the cup body is filled with the material, if the heating time is not enough under the set heating power condition, the conditions of no water and water exist, which cannot be distinguished and result in misjudgment, and if the heating time is too long and the temperature difference value is too large, which results in the risk of damage caused by too high temperature rise of the heating device, the selection of the heating time (namely, the first preset time t 1) ensures whether the machine is burnt effectively, so that the reliability of the machine is improved, and the user experience is improved.
In the exemplary embodiment of the application, because the materials are judged in the cup body in the first judging stage, a certain temperature difference needs to be ensured when the machine is configured with heating time in the second judging stage, and in addition, the time requirement of motor slurry stirring circulation needs to be met, so that the judging time is shortened to the maximum extent, the material amount placed by a user is effectively identified, the material amount is timely fed back to the user, the user experience is improved, and the intelligent degree of the machine is improved.
In an exemplary embodiment of the present application, before entering the dry burning prevention control method of the embodiment of the present application, whether an entry condition of the dry burning prevention control flow is met may be first detected.
In an exemplary embodiment of the present application, the method may further include:
under the condition of continuous pulping of the food processor, before each continuous pulping, detecting a fourth bottom temperature T4 of the cup body, controlling the heating device to heat for a third preset time T3, and then detecting a fifth bottom temperature T5 of the cup body; calculating a third temperature difference value delta T3 between the fourth bottom temperature T4 and the fifth bottom temperature T5, and judging whether to enter a dry burning control process according to the magnitude relation between the third temperature difference value delta T3 and a preset temperature value;
wherein the preset temperature value is the normal temperature T of the current environment 0 And a set temperature T n And (4) summing.
In the exemplary embodiment of the present application, when the machine continuously performs pulping, when the machine is powered on, the initial temperature T4 (i.e., the fourth bottom temperature T4) in the cup may be detected first, the main controller detects the temperature in the cup in real time, and after waiting for T3 seconds, the temperature T5 (i.e., the fifth bottom temperature T5) in the cup may be detected.
When T4 is less than or equal to T 0 +T n In time, dry burning prevention detection and judgment can be directly carried out;
when T4 is present>T 0 +T n In time, the adjustment control may be performed based on the temperature difference detected by the temperature sensor after t2 seconds:
when | T5-T4| > T n When the user selects the function, the user can judge that the user places the material and execute the function according to the function selected by the user;
when | T5-T4-<T n And when the material is placed by the user, the user can be judged to be too few or not, and the alarm prompts the user to place the material.
In the exemplary embodiment of the application, before dry burning prevention processing, whether dry burning control processing is performed or not is determined according to the real-time temperature of the detection temperature sensor and the initial environment temperature, so that the detection reliability is guaranteed, and the intelligent degree of a machine is improved.
In the exemplary embodiment of the application, when making milk or user place high temperature material in succession, when the temperature that detects temperature sensor is higher, state in the temperature variation discernment cup through certain time, implements different control according to the state of difference and handles, has improved user experience, has promoted the machine intelligent degree.
In the exemplary embodiment of the present application, the heating time period may be adaptively adjusted and determined according to the temperature difference.
In an exemplary embodiment of the present application, the method may further include:
after judging that no material is in the cup body, controlling the process according to the dry burning preventionThe first temperature difference value Delta T1 reaches the temperature difference threshold value T g And adjusting the first preset time t1 according to the size relation between the time duration and the first preset time t1.
In an exemplary embodiment of the application, when the machine determines that there is no water, when the machine is performing the dry burning prevention detection determination process and the temperature difference value has reached the temperature difference threshold within the heating determination time period (e.g., the first preset time period t 1), the heating determination time period may be adjusted to t- Δ t and stored.
In the exemplary embodiment of the application, when the machine determines that there is no water, when the machine is performing the dry burning prevention detection determination process and the temperature difference value does not reach the temperature difference threshold after the heating determination time period (e.g., the first preset time period t 1), the heating determination time period may be adjusted to t + Δ t and stored.
In an exemplary embodiment of the present application, Δ t may be set to 8-12 seconds, for example, 10 seconds may be selected.
In the exemplary embodiment of the application, the heating power of the machine is set, and the heat load generated by the judgment threshold is consistent, but the heat loss coefficients under different working condition environments are different, so that the heating time of the machine reaching the judgment threshold is deviated, the judgment time is adaptively adjusted according to the temperature difference, the detection reliability is ensured, the detection efficiency is improved, and the user experience is improved.
In the exemplary embodiment of the application, due to the problems of deviation of the electric heating tube, deviation or abnormity of the temperature sensor and the like, by adjusting the heating compensation time length parameter, misjudgment caused by over-short or over-long heating time length adjustment is avoided, and the detection reliability is ensured.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
Claims (9)
1. A method of controlling a food processor, the food processor comprising: a cup body and a heating device; a temperature sensor is arranged at the bottom of the cup body; the method comprises the following steps:
after the pulping function is started, judging whether materials exist in the cup body according to the bottom temperature of the cup body;
stopping heating when the cup body is judged to be free of materials, and sending a material-free prompt; when the material is judged to be in the cup body, the heating temperature difference delta T1 is obtained according to the bottom temperature of the cup body and the preset first lowest water level line Mixing of Determining whether to carry out one or more times of material judgment again or not according to the size relationship so as to determine whether the material amount in the cup body meets the pulping requirement or not;
the bottom temperature according to the cup judges whether there is the material in the cup includes:
controlling the heating device to heat for a first preset time period t1 by adopting a first preset heating power P1, and detecting the bottom temperature of the cup body in real time through the temperature sensor;
calculating a first temperature difference value delta T1 between a first bottom temperature T1 detected at the initial moment after the pulping function is started and a second bottom temperature T2 detected after the first preset time period T1 is reached;
according to the first temperature difference value delta T1 and a preset temperature difference threshold value T g The size relationship of (2) judges whether the cup body contains materials or not.
2. Method for controlling a food processor according to claim 1, wherein said first temperature difference Δ T1 is dependent on a predetermined temperature difference threshold T g Judging whether the materials exist in the cup body or not according to the size relationship comprises the following steps: when DeltaT 1 is more than or equal to T g Judging that no material exists in the cup body; when Δ T1<T g And judging that the cup body contains the material.
3. The control method of a food processor as set forth in claim 1, wherein the food processor further comprises: a fuse link;
the method further comprises the following steps: according to the first temperature difference value delta T1 and a preset temperature difference threshold value T g Before judging whether the material exists in the cup body or not according to the size relation of the temperature difference, the rated power P of the heating device is used 0 And the fusing temperature T of the fuse link Fusion furnace Calculating the first preset time T1 and the temperature difference threshold value T g 。
4. A control method for a food processor as claimed in claim 3, characterized in that the control method is based on the power rating P of the heating means 0 And/or the fusing temperature T of the fuse link Fusion furnace Calculating the first preset time T1 and the temperature difference threshold value T g The method comprises the following steps:
T g ＝(T fusion furnace -T 0 )/2；T 0 The normal temperature of the current environment;
t1＝(σ cup with elastic band *C Cup with elastic band *m Cup with elastic band *T g )/P 0 ；σ Cup with elastic band Is the thermal conductivity of the cup body, C Cup with elastic band Is the specific heat capacity of the cup body, m Cup with elastic band Is the mass of the cup body.
5. The control method of a food processor as set forth in claim 1, wherein the bottom temperature of the cup body is a first temperature difference Δ T1 between a first bottom temperature T1 detected at an initial time after the slurry function is activated and a second bottom temperature T2 detected after heating for a first preset time period T1 with a first preset heating power P1;
according to the difference value delta T1 between the bottom temperature of the cup body and the preset first lowest water level line heating temperature Mixing of Determining whether to perform one or more material judgments again comprises:
when Δ T1<ΔT1 Mixing of When the pulping process is finished, judging that the amount of the materials meeting the pulping requirement is placed in the cup body, and entering a normal pulping process;
when Δ T1 Mixing of ≤△T1<T g And judging the amount of a small amount of materials which cannot meet the pulping requirement placed in the cup body, and judging the materials once or many times.
6. A control method for a food processor as claimed in claim 4 or 5, characterized in that the food processor further comprises a motor; the step of judging the materials once or more comprises the following steps:
controlling the heating device to heat a second preset time period T2 by adopting a second preset heating power P2, and calculating a second lowest water level line heating temperature difference value delta T2 according to the second preset heating power P2 and the second preset time period T2 Mixing of ；
Within the second preset time period t2, driving the motor to intermittently work at a set rotating speed S;
after the second preset time period T2 is reached, detecting a third bottom temperature T3 through the temperature sensor, and calculating a second temperature difference value Δ T2 between the third bottom temperature T3 and the second bottom temperature T2;
the second temperature difference value delta T2 and the second lowest water level line heating temperature difference value delta T2 are compared Mixing of Comparing, and judging whether the material amount in the cup body meets the pulping requirement according to the comparison result;
wherein, judge whether the material volume satisfies the slurrying requirement in the cup according to the comparative result includes:
when DeltaT 2 is more than or equal to DeltaT 2 Mixing of When the cup is used, judging that a small amount of materials which cannot meet the pulping requirement are placed in the cup body, stopping heating and giving a material-free prompt;
when Δ T2<ΔT2 Mixing of And then, judging that the amount of the materials meeting the pulping requirement is placed in the cup body, and entering a normal pulping process.
7. The control method of a food processor as defined in claim 6,
the second preset heating power P2 is different from the first preset heating power P1, and the first preset heating power P1 is in accordance with the rated power P of the heating device 0 Determining the size of the target; and/or the presence of a gas in the gas,
the second preset time T2 is different from the first preset time T1, and the first preset time T1 is according to the temperature difference threshold value T g Determining; and the second preset time t2 is determined according to the size relation between the working time and/or the pause time of each time when the motor works intermittently and the heating time calculated according to the law of conservation of energy.
8. The control method of a food processor as set forth in claim 6, further comprising:
under the condition of continuous pulping of the food processor, before each continuous pulping, detecting a fourth bottom temperature T4 of the cup body, controlling the heating device to heat for a third preset time T3, and then detecting a fifth bottom temperature T5 of the cup body; calculating a third temperature difference value delta T3 between the fourth bottom temperature T4 and the fifth bottom temperature T5, and judging whether to enter a dry burning control process according to the magnitude relation between the third temperature difference value delta T3 and a preset temperature value;
wherein the preset temperature value is the normal temperature T of the current environment 0 And a set temperature T n And (4) summing.
9. The control method of a food processor as defined in claim 6, further comprising:
after the fact that no material exists in the cup body is judged, the temperature difference threshold T is reached according to the first temperature difference value delta T1 in the dry burning prevention control process g And adjusting the first preset time t1 according to the size relation between the time duration and the first preset time t1.
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