CN108309020B - Electric cooker and anti-overflow heating control method and device thereof - Google Patents

Electric cooker and anti-overflow heating control method and device thereof Download PDF

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Publication number
CN108309020B
CN108309020B CN201710034748.7A CN201710034748A CN108309020B CN 108309020 B CN108309020 B CN 108309020B CN 201710034748 A CN201710034748 A CN 201710034748A CN 108309020 B CN108309020 B CN 108309020B
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heating
electric cooker
foam
time
power
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CN108309020A (en
Inventor
雷俊
刘文华
王云峰
曾露添
张帆
江德勇
黄庶锋
瞿月红
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/08Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0802Control mechanisms for pressure-cookers
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/08Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/086Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/56Preventing boiling over, e.g. of milk
    • A47J27/62Preventing boiling over, e.g. of milk by devices for automatically controlling the heat supply by switching off heaters or for automatically lifting the cooking-vessels
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/24Warming devices
    • A47J36/2483Warming devices with electrical heating means

Abstract

The invention discloses an electric cooker and an anti-overflow heating control method and device thereof, wherein the anti-overflow heating control method comprises the following steps: after the electric cooker enters a boiling stage, detecting steam foam generated during cooking of the electric cooker through a foam detection device; if the steam foam is detected, controlling the electric cooker to stop heating, acquiring the time for the foam detection device to continuously detect the foam, and calculating the heating recovery power of the electric cooker after the electric cooker stops heating according to the time for the foam detection device to continuously detect the foam; when the time for stopping heating of the electric cooker reaches the set time T1, the electric cooker is controlled to perform heating operation by the recovery heating power. Therefore, on the premise of effectively preventing the electric cooker from overflowing, the full boiling of the food cooked by the electric cooker is ensured.

Description

Electric cooker and anti-overflow heating control method and device thereof
Technical Field
The invention relates to the technical field of cooking appliances, in particular to an electric cooker and an anti-overflow heating control method and device thereof.
Background
In the related art, when an electric cooker (such as an electric cooker) is controlled to prevent overflow, an overflow detection device is assembled to detect whether the electric cooker overflows in a boiling stage, and when the electric cooker is detected to overflow, the electric cooker is controlled to stop heating for a period of time and then to resume heating, the time of stopping heating is usually fixed, and the heating power adopted when the electric cooker resumes heating is the same as the heating power before stopping heating.
When the rice cooker cooks rice, the heating stop time is generally set to be longer in order to deal with different rice water grades, so that the continuous boiling time of the cooked food is reduced, the cooked food is insufficiently boiled, and the taste of the cooked food is influenced. And the original power is recovered for heating, which may cause the soup to flow back in time and cause the overflow risk.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above.
Therefore, an object of the present invention is to provide an anti-overflow heating control method for an electric cooker, which calculates a heating recovery power after stopping heating based on a time for continuously detecting foam, so as to quickly find a suitable power for heating recovery, effectively increase a boiling duration, ensure sufficient boiling of food cooked by the electric cooker, and effectively prevent an overflow phenomenon from occurring in the electric cooker.
Another object of the present invention is to provide an anti-overflow heating control device of an electric cooker.
It is yet another object of the present invention to provide an electric cooker.
In order to achieve the above object, an embodiment of the present invention provides an anti-overflow heating control method for an electric cooking device, including the following steps: after the electric cooker enters a boiling stage, detecting steam foam generated during cooking of the electric cooker through a foam detection device; if the steam foam is detected, controlling the electric cooker to stop heating, acquiring the time for the foam detection device to continuously detect the foam, and calculating the heating recovery power of the electric cooker after the electric cooker stops heating according to the time for the foam detection device to continuously detect the foam; when the time for stopping heating of the electric cooker reaches the set time T1, the electric cooker is controlled to perform heating operation by the recovery heating power.
According to the anti-overflow heating control method of the electric cooker, after the electric cooker enters the boiling stage, the steam foam generated during cooking of the electric cooker is detected through the foam detection device, if the steam foam is detected, the electric cooker is controlled to stop heating, the time for continuously detecting the foam through the foam detection device is obtained, the heating recovery power after the electric cooker stops heating is calculated according to the time for continuously detecting the foam through the foam detection device, then when the time for stopping heating of the electric cooker reaches the set time T1, the electric cooker is controlled to perform heating work through the heating recovery power, therefore, the heating recovery power after the electric cooker stops heating can be calculated according to the time for continuously detecting the foam, proper power can be quickly found for recovering heating, the continuous boiling time is effectively increased, and the full boiling of food cooked by the electric cooker is guaranteed, the taste of the cooked food is improved, and the overflow phenomenon of the electric cooker can be effectively prevented.
In addition, the anti-overflow heating control method of the electric cooker of the embodiment of the invention also has the following additional technical characteristics:
in one embodiment of the present invention, calculating the heating power recovery after the electric cooker stops heating according to the time when the foam detecting means continuously detects foam comprises: judging whether the time t for the foam detection device to continuously detect the foam is less than a first preset time or not; if t is less than the first preset time, taking the heating power of the electric cooker before the electric cooker stops heating as the recovery heating power; if t is greater than or equal to the first preset time, the recovered heating power P1 is equal to P × b, where P is the heating power of the electric cooker before the electric cooker stops heating or the rated power of the electric cooker, and b is a preset coefficient.
In one embodiment of the invention, b is less than 1.
In an embodiment of the present invention, it is further determined whether the recovery heating power P1 is less than a preset minimum heating power P2, wherein if the recovery heating power P1 is less than the preset minimum heating power P2, the electric cooker is controlled to perform heating operation with the preset minimum heating power P2.
In an embodiment of the invention, when the foam detection device detects the steam foam, an interval time between two consecutive times of detection of the steam foam is further acquired, and when the interval time is greater than a second preset time, the electric cooker is controlled to stop heating, until the heating stop time of the electric cooker reaches a second time threshold, the heating power of the electric cooker before the electric cooker stops heating is increased, and the electric cooker is controlled to perform heating operation with the increased heating power.
In order to achieve the above object, an anti-overflow heating control device for an electric cooking device according to another embodiment of the present invention includes a detection module and a main control module, wherein after the electric cooking device enters a boiling stage, the detection module detects steam bubbles generated during cooking of the electric cooking device through a bubble detection device, and generates a bubble detection signal when the bubble detection device detects the steam bubbles; if the detection module outputs the foam detection signal to the main control module, the main control module controls the electric cooker to stop heating, obtains the time for the foam detection device to continuously detect foam, and calculates the heating recovery power of the electric cooker after the electric cooker stops heating according to the time for the foam detection device to continuously detect foam; the main control module is further used for controlling the electric cooking device to perform heating operation by the heating power recovery when the time for stopping heating of the electric cooking device reaches a set time T1.
According to the anti-overflow heating control device of the electric cooker, after the electric cooker enters a boiling stage, the detection module detects steam foam generated during cooking of the electric cooker through the foam detection device, and generates a foam detection signal when the foam detection device detects the steam foam, if the detection module outputs the foam detection signal to the main control module, the main control module controls the electric cooker to stop heating, obtains the continuous foam detection time of the foam detection device, calculates the heating recovery power of the electric cooker after the electric cooker stops heating according to the continuous foam detection time of the foam detection device, and then when the heating stop time of the electric cooker reaches the set time T1, the main control module controls the electric cooker to perform heating work by recovering the heating power. Therefore, the heating recovery power after heating stopping can be calculated based on the time of continuously detecting the foam, so that the proper power can be quickly found for heating recovery, the continuous boiling time is effectively prolonged, the full boiling of the food cooked by the electric cooker is ensured, the mouthfeel of the cooked food is improved, and the overflow phenomenon of the electric cooker can be effectively prevented.
In addition, the anti-overflow heating control device of the electric cooker of the embodiment of the invention also has the following additional technical characteristics:
in an embodiment of the present invention, when the main control module calculates the heating recovery power of the electric cooking device after stopping heating according to the time when the foam detection device continuously detects foam, it is determined whether the time t when the foam detection device continuously detects foam is less than a first preset time, wherein if t is less than the first preset time, the main control module uses the heating power of the electric cooking device before stopping heating as the heating recovery power; if t is greater than or equal to the first preset time, the main control module calculates the heating power recovery P1 as P × b, where P is the heating power of the electric cooking device before the electric cooking device stops heating or the rated power of the electric cooking device, and b is a preset coefficient.
In one embodiment of the invention, b is less than 1.
In an embodiment of the present invention, the main control module further determines whether the recovered heating power P1 is less than a preset minimum heating power P2, wherein if the recovered heating power P1 is less than the preset minimum heating power P2, the main control module controls the electric cooker to perform the heating operation with the preset minimum heating power P2.
In an embodiment of the present invention, when the foam detecting device detects the steam foam, the main control module is further configured to obtain an interval time between two consecutive times of detection of the steam foam by the foam detecting device according to the received foam detection signal, and when the interval time is greater than a second preset time, the main control module controls the electric cooker to stop heating, until the heating stop time of the electric cooker reaches a second time threshold, increases the heating power of the electric cooker before the electric cooker stops heating, and controls the electric cooker to perform heating operation with the increased heating power.
In addition, the embodiment of the invention also provides an electric cooker which comprises the anti-overflow control device of the electric cooker.
According to the electric cooker provided by the embodiment of the invention, through the anti-overflow heating control device, the heating recovery power of the electric cooker after the electric cooker stops heating can be calculated based on the time for continuously detecting the foam, so that the proper power can be quickly found for heating recovery, the continuous boiling time can be effectively increased, the full boiling of the food cooked by the electric cooker can be ensured, the mouthfeel of the cooked food can be improved, and the overflow phenomenon of the electric cooker can be effectively prevented.
Drawings
Fig. 1a is a flowchart of an anti-overflow heating control method of an electric cooker according to an embodiment of the present invention;
FIG. 1b is a flowchart of an anti-overflow heating control method of an electric cooker according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a heating cooking curve of an electric cooker according to one embodiment of the invention;
FIG. 3a is a schematic diagram of an electric cooker according to an embodiment of the invention;
FIG. 3b is an overflow detection schematic of an electric cooker according to an embodiment of the present invention;
fig. 4 is a schematic structural view of an electric cooker according to another embodiment of the present invention;
FIG. 5a is a schematic circuit diagram of a foam sensing assembly according to an embodiment of the present invention;
FIG. 5b is a schematic circuit diagram of a foam sensing assembly according to another embodiment of the present invention;
FIG. 6 is a schematic structural view of a foam sensing assembly according to one embodiment of the present invention;
FIG. 7a is a schematic structural view of a foam sensing assembly for an electric cooker according to an embodiment of the present invention;
FIG. 7b is a schematic structural view of a foam sensing assembly for an electric cooker according to another embodiment of the present invention;
fig. 8 is a flowchart of an anti-overflow heating control method of an electric cooker according to another embodiment of the present invention;
fig. 9 is a flowchart of an anti-overflow heating control method of an electric cooker according to still another embodiment of the present invention;
FIG. 10 is a block schematic diagram of an anti-overflow heating control device of an electric cooker according to one embodiment of the present invention; and
fig. 11 is a block schematic diagram of an electric cooker according to one embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An anti-overflow heating control method of an electric cooker, an anti-overflow heating control device of an electric cooker, and an electric cooker having the anti-overflow heating control device according to embodiments of the present invention will be described below with reference to the accompanying drawings. In the embodiment of the invention, the electric cooker can be a cooking product such as an electric cooker, an electric pressure cooker and the like.
Generally, in an electric cooker, during cooking food, the cooking food flows due to heating, so that as the cooking food flows, air is introduced into the cooking food to generate bubbles, the electric cooker heats more power, the cooking food flows more vigorously, and the introduced air generates more bubbles.
Thus, after the electric cooker enters the boiling stage, more air is introduced and the foam is generated more vigorously, and thus the heating is generally stopped for a certain period of time in order to prevent the foam from overflowing.
However, in practical applications, the current heating powers corresponding to the electric cooking devices about to overflow are different, so that the degrees of severity of boiling generated by the current heating powers are different, the continuous detection of the overflowing foam is also different, the boiling is more severe when the current heating power is higher, the time for detecting the foam is longer, the thermal inertia influence of the electric cooking device is larger, the heating stopping time is longer, and the power required to be reduced is also larger. The smaller the current heating power, the less vigorous the boiling, the shorter the time the foam is detected, the smaller the thermal inertia effect of the electric cooker, the shorter the heating time needs to be stopped, and the smaller the power needs to be reduced.
Therefore, in order to fully boil the cooked food, the invention provides an anti-overflow heating control method of an electric cooker, which can calculate the heating recovery power after heating is stopped based on the continuous detected foam time, thereby quickly finding out the proper power to recover heating, effectively increasing the continuous boiling time, ensuring the full boiling of the food cooked by the electric cooker, and effectively preventing the electric cooker from overflowing. The concrete description is as follows:
fig. 1a is a flowchart of an anti-overflow heating control method of an electric cooker according to an embodiment of the present invention. As shown in fig. 1a, the anti-overflow heating control method of the electric cooker comprises the following steps:
and S1, detecting steam foam generated when the electric cooker cooks through a foam detection device after the electric cooker enters the boiling stage.
Wherein, foam detection device can set up in the upper cover of electric cooking ware, detects steam foam through foam detection device and judges whether electric cooking ware is about to take place to spill over.
As shown in fig. 2, an electric cooker such as an electric rice cooker generally includes a water absorption stage, a heating stage, a boiling stage and a stewing stage when cooking rice, and an overflow phenomenon of the electric cooker generally occurs in the boiling stage. It should be noted that the boiling stage in the embodiment of the present invention may be broadly understood, for example, after the electric cooker starts to cook, the temperature in the electric cooker is detected, and when the temperature in the electric cooker is detected to reach a certain temperature, for example, 85 degrees celsius to 95 degrees celsius, the electric cooker may be considered to enter the boiling stage.
And S2, if steam foam is detected, controlling the electric cooker to stop heating, acquiring the time when the foam detection device continuously detects the foam, and calculating the heating recovery power after the electric cooker stops heating according to the time when the foam detection device continuously detects the foam.
According to an embodiment of the present invention, calculating the heating power recovery after the electric cooker stops heating according to the time when the foam detecting means continuously detects foam includes: judging whether the time t for the foam detection device to continuously detect the foam is less than a first preset time or not; if t is less than the first preset time, taking the heating power of the electric cooker before the electric cooker stops heating as the recovery heating power; if t is greater than or equal to the first preset time, the recovered heating power P1 is equal to P × b, where P is the heating power of the electric cooker before the electric cooker stops heating or the rated power of the electric cooker, and b is a preset coefficient.
Specifically, in one example of the present invention, b is less than 1.
And S3, when the time for stopping heating of the electric cooker reaches the set time T1, the electric cooker is controlled to perform heating operation by recovering the heating power.
The set time T1 may be a calibration value, or may be calculated according to the time T when the foam detection device continuously detects the foam, and the calculation process may specifically refer to the following description.
According to an embodiment of the invention, it is further determined whether the recovery heating power P1 is less than a preset minimum heating power P2, wherein if the recovery heating power P1 is less than the preset minimum heating power P2, the electric cooker is controlled to perform heating operation with the preset minimum heating power P2.
According to an embodiment of the invention, when the foam detection device detects the steam foam, the interval time of detecting the steam foam twice continuously is further acquired, and when the interval time is greater than a second preset time, the electric cooker is controlled to stop heating, until the heating stop time of the electric cooker reaches a second time threshold, the heating power of the electric cooker before the electric cooker stops heating is increased, and the electric cooker is controlled to perform heating operation by the increased heating power.
According to the anti-overflow heating control method of the electric cooker, after the electric cooker enters the boiling stage, the steam foam generated during cooking of the electric cooker is detected through the foam detection device, if the steam foam is detected, the electric cooker is controlled to stop heating, the time for continuously detecting the foam through the foam detection device is obtained, the heating recovery power after the electric cooker stops heating is calculated according to the time for continuously detecting the foam through the foam detection device, then when the time for stopping heating of the electric cooker reaches the set time T1, the electric cooker is controlled to perform heating work through the heating recovery power, therefore, the heating recovery power after the electric cooker stops heating can be calculated according to the time for continuously detecting the foam, proper power can be quickly found for recovering heating, the continuous boiling time is effectively increased, and the full boiling of food cooked by the electric cooker is guaranteed, the taste of the cooked food is improved, and the overflow phenomenon of the electric cooker can be effectively prevented.
Fig. 1b is a flowchart of an anti-overflow heating control method of an electric cooker according to an embodiment of the present invention. As shown in fig. 1b, the anti-overflow heating control method of the electric cooker comprises the following steps:
s101, after the electric cooker enters a boiling stage, steam foam generated during cooking of the electric cooker is detected through a foam detection device.
As shown in fig. 2, an electric cooker such as an electric rice cooker generally includes a water absorption stage, a heating stage, a boiling stage and a stewing stage when cooking rice, and an overflow phenomenon of the electric cooker generally occurs in the boiling stage. Therefore, in order to improve the efficiency of detecting steam bubbles generated when the electric cooker cooks, after the electric cooker enters the boiling stage, the bubbles generated by the electric cooker are detected by the bubble detection device to detect whether the electric cooker is about to overflow.
Specifically, after the electric cooker enters the boiling stage, the steam foam generated during cooking of the electric cooker can be detected by the foam detection device arranged in the upper cover of the electric cooker, and in order to describe more clearly the implementation process of the foam detection device for detecting the steam foam generated during cooking of the electric cooker, the following description is provided with reference to the attached drawings.
Specifically, as shown in fig. 3a to 7b, the foam detecting device 10 is disposed in the upper cover of the electric cooker, and the foam detecting device 10 includes at least one foam sensing element 101, wherein when each foam sensing element 101 senses steam foam generated by the electric cooker, a capacitance value of the foam detecting device 10 changes; the detection module comprises a capacitance detection chip 20, the capacitance detection chip 20 is connected with the foam detection device 10, the capacitance detection chip 20 generates a foam detection signal through detecting the capacitance value change condition of the foam detection device 10, the capacitance detection chip 20 is connected with the main control module 40, the main control module 40 is connected with the heating power control module 30, the heating power control module 30 is used for controlling the heating power of the electric cooking device, when the main control module 40 judges that the capacitance value of the foam detection device 10 changes according to the foam detection signal, the phenomenon that the electric cooking device is about to overflow is judged.
Specifically, in the process that the electric cooker heats rice water in the inner pot, the capacitance detection chip 20 can detect the capacitance value variation of the foam detection device 10 in real time, when the electric cooker is in a water absorption stage and a heating stage, the temperature of a rice water mixture in the inner pot of the electric cooker is low, no steam foam or only a small amount of steam foam is generated, and the capacitance value of the foam detection device 10 is not changed; after rice water in the inner pot is heated to boiling, steam foam generated by boiling can contact the foam sensing assemblies 101 arranged at different positions, the capacitance value of each foam sensing assembly 101 can be changed when the foam sensing assembly is contacted with the steam foam, and then the capacitance value of the foam detection device 10 is changed. Further, the capacitance detection chip 20 detects a capacitance variation of the foam detection device, and if the capacitance variation of the foam detection device 10 is smaller than or equal to a preset threshold, the main control module 40 determines that the capacitance of the foam detection device 10 is not changed, and controls the electric cooker to maintain the current heating power for heating; if the capacitance value variation of the foam detection device 10 is larger than the preset threshold, the capacitance value of the foam detection device is judged to be changed, and the phenomenon that the electric cooker is about to overflow is detected.
According to one embodiment of the present invention, as shown in fig. 3a and 4, each of the foam sensing assemblies 101 is disposed in the steam channel 3 of the upper cover 4 or on the lower surface of the upper cover. As shown in fig. 3a, the foam induction assembly 101 may be one, and the foam induction assembly 101 is disposed in the steam passage 3 of the electric cooker, and the steam flowing direction in the steam passage 3 is as shown by the arrow in fig. 3 a.
Specifically, when the rice water in the inner pot of the electric cooker is heated and boiled, the steam bubbles generated in the inner pot of the electric cooker contact the bubble sensing assembly 101 according to the flowing direction shown in fig. 3a, and the capacitance detecting chip 20 detects the capacitance variation of the foam detecting device 10 to generate the foam detecting signal. Furthermore, the main control module 40 determines whether the capacitance value of the foam detection device 10 changes according to the foam detection signal, and when the capacitance value variation of the foam detection device 10 is greater than the preset threshold, the main control module 40 determines that the capacitance value of the foam detection device 10 changes, thereby determining that the electric cooking device is about to overflow.
According to an embodiment of the present invention, as shown in fig. 3b, the power terminals of the capacitance detection chip 20 and the main control module 40 are connected to a preset power supply VDD, the preset power supply VDD is used for supplying power to the capacitance detection chip 20 and the main control module 40, and a first resistor R1 is further connected between the capacitance detection chip 20 and the foam detection device 10. Wherein, first resistance R1 is used for carrying out filtering processing to the capacitance value variation signal of foam response subassembly 101 to can play anti-jamming effect.
According to a specific example of the present invention, the resistance value of the first resistor R1 may be 10 Ω to 10k Ω.
According to an embodiment of the present invention, when the number of the bubble sensing members 101 is plural, the height between the installation position of each bubble sensing member 101 and the horizontal plane becomes gradually higher. In other words, the distance between each foam sensing assembly 101 and the surface of the rice-water mixture is gradually increased. And the higher the setting height of the foam sensing assembly 101 is, the closer the foam sensing assembly 101 is to the steam outlet a in the steam channel.
Specifically, the foam sensing assembly 101 may be disposed at different heights by providing protrusions at different heights in the steam channel 3.
For example, as shown in fig. 4, two foam sensing members 101, i.e., a first foam sensing member 101A and a second foam sensing member 101B, may be disposed in the steam channel 3 of the electric cooker, wherein the second foam sensing member 101B is disposed at the rear end of the steam channel 3, the second foam sensing member 101B is disposed on the upper surface inside the steam channel 3, the first foam sensing member 101A is disposed at the front end of the steam channel 3, and the first foam sensing member 101A is disposed on the protruding portion 301 of the upper surface, and thus, the disposition height of the second foam sensing member 101B is higher than that of the first foam sensing member 101A.
It should be understood that the flowing direction of the steam in the steam channel 3 is as shown by the arrow in fig. 4, and as can be seen from the changing direction of the arrow, the steam bubbles will enter the steam channel after being generated, and gradually approach to the steam outlet a of the steam channel 3 and gradually approach to a higher position, so that the steam bubbles first contact the first foam sensing element 101A and then contact the second foam sensing element 101B.
Specifically, as shown in fig. 4, in the heating process of rice water in the pot of the electric cooker, steam foam may rise to the position of the foam detecting device 10, when the steam foam contacts the first foam sensing element 101A, the capacitance value of the first foam sensing element 101A changes, the capacitance detecting chip 20 detects that the capacitance value variation of the foam detecting device 10 is Δ C1, and Δ C1 is less than or equal to a preset threshold, the capacitance detecting chip 20 may generate a first foam detecting signal, where the first foam detecting signal is a chip readable signal such as a digital signal, and at this time, the main control module 40 determines that the capacitance value of the foam detecting device 10 does not change, so that the main control module 40 controls the heating module 5 to keep the current heating power unchanged through the heating power control module 30; continuing to heat, when steam foam contacts second foam response subassembly 101B, the capacitance values of first foam response subassembly 101A and second foam response subassembly 101B all change, capacitance detection chip 20 detects that the capacitance value variation of foam detection device 10 is Δ C2, Δ C2 is greater than preset threshold, capacitance detection chip 20 can generate second foam detection signal, wherein, second foam detection signal is chip readable signal such as digital signal, main control module 40 judges that the capacitance value of foam detection device 10 changes this moment, thereby detect that electric cooking ware is about to take place the overflow phenomenon.
It should be noted that the capacitance detecting chip 20 detects the capacitance variation of the foam detecting apparatus 10 as the sum of the capacitance variations of the plurality of foam sensing elements 101.
According to one embodiment of the present invention, the plurality of foam sensing elements 101 are connected together and then connected to the capacitance detecting chip 20.
According to an embodiment of the present invention, as shown in fig. 5a, a plurality of foam sensing elements 101 are connected together and then connected to the capacitance detecting chip 20 through a first resistor R1. Wherein, first resistance R1 is used for carrying out filtering processing to the capacitance value variation signal of foam response subassembly 101 to can play anti-jamming effect.
According to a specific example of the present invention, the resistance value of the first resistor R1 may be 10 Ω to 10k Ω.
According to one embodiment of the present invention, each of the foam sensing members 101 is connected to the capacitance detecting chip 20.
According to an embodiment of the present invention, as shown in fig. 5b, each of the foam sensing elements 101 is connected to the capacitance detecting chip 20 through a second resistor R2. Wherein, second resistance R2 is used for carrying out filtering processing to the capacitance value variation signal of foam response subassembly 101 to can play anti-jamming effect.
According to a specific example of the present invention, the resistance value of the second resistor R2 may be 10 Ω to 10k Ω.
According to an embodiment of the present invention, as shown in fig. 6, each foam sensing assembly 101 includes a foam contact portion 11 and a sensing portion 12, wherein the foam contact portion 11 is an insulator 100, the sensing portion 12 is a conductor 200, and the insulator 100 isolates the vapor foam from the conductor 200.
Specifically, as shown in fig. 6, the insulator 100 defines a receiving cavity 120 with an open upper surface, and the conductive body 200 defines an upper surface, a lower surface and side surfaces, wherein the conductive body 200 is disposed in the receiving cavity 120, the insulator 100 covers the lower surface and the side surfaces of the conductive body 200 at the same time, and the upper surface of the conductive body 200 is exposed from the insulator 100 so as to be connected to the capacitance detecting chip 20. Thus, by combining insulator 100 and conductor 200, capacitive foam sensing assembly 101 can be formed.
When the foam contact part 11 of the foam sensing assembly 101 is not contacted with the steam foam, each foam sensing assembly 101 in the foam detection device 10 only has the parasitic capacitance of the foam sensing assembly itself; when rice water in a pot in the electric cooker is heated and boiled, the generated steam foam and the foam contact part 11 and the sensing part 12 of the foam sensing component 101 form a capacitor, and according to the determining formula of the capacitor:
Figure BDA0001212768960000091
(wherein, S is a dielectric constant, and is a facing surface area, and d is a distance between the electrode plates.) it can be seen that, as rice water in the pot of the electric cooker is heated and boiled more vigorously, more steam bubbles are generated, the larger the area of the bubble contact portion 11 covered by the steam bubbles is, and the larger the facing surface area S between the electrode plates is, the larger the amount of change in capacitance value of the bubble detecting device 10 is.
Therefore, the foam detection device isolates the steam foam from the conductive body 200 through the insulator 100, the insulator 100 is indirectly contacted with the steam foam, and the steam foam is detected by detecting the capacitance value change of the foam induction component 101, so that the non-electric contact detection of the foam is realized.
According to an embodiment of the present invention, the insulator 100 is disposed adjacent to the conductor 200. Wherein the insulator 100 may have a thickness of 1-10 mm.
Specifically, the equation for the capacitance-based decision is:
Figure BDA0001212768960000092
it is understood that the larger the thickness of the insulator 100, the larger the inter-plate distance d, and the smaller the amount of change in capacitance in the case where the amount of steam bubbles overflowing is the same. In this way, the thickness of the insulator 100 can be selected as the case may be.
A foam sensing assembly 101 for an electric cooker according to one embodiment of the present invention will be described with reference to fig. 7 a.
As shown in fig. 7a, a foam sensing assembly 101 for an electric cooker according to an embodiment of the present invention includes an insulator 100 and an electric conductor 200.
Specifically, the conductive body 200 is horizontally disposed, that is, the thickness direction of the conductive body 200 is oriented in the up-down direction, whereby the lower surface of the conductive body 200 faces horizontally downward and the lower surface of the insulator 100 (i.e., the detection surface 110) faces horizontally downward, increasing the effective detection area, thereby improving the sensitivity of the overflow detection.
Alternatively, the area of the detecting surface 110 may be determined according to the size requirement of the detecting signal in practical application. For example, the area of the detection surface 110 is 50mm2-400mm2On the one hand, when there is less foam to touch the detection surface 110, it can still be guaranteed that the change in capacitance is large enough to facilitate detection, and on the other hand, it can be guaranteed that the interference of the outside to the overflow detection is small.
Advantageously, the detecting surface 110 is circular, i.e. the conductive body 200 is a circular piece, which not only facilitates the manufacturing process, but also the cross section of the cooking cavity of the electric cooking device is generally circular, and the circular detecting surface 110 has higher applicability.
Of course, the conductive body 200 and the detecting surface 110 may have any other shapes, and the present invention is not limited thereto.
In some embodiments of the present invention, as shown in fig. 7a, the insulator 100 further covers the side surfaces of the electrical conductor 200, i.e., the insulator 100 covers both the lower surface and the side surfaces of the electrical conductor 200. Thereby, the reliability of the overflow detection function of the foam sensing assembly 101 may be improved.
Specifically, as shown in fig. 7a, the insulator 100 defines a receiving cavity 120 with an open upper surface, the conductive body 200 is disposed in the receiving cavity 120, the insulator 100 covers the lower surface and the side surface of the conductive body 200 at the same time, and the upper surface of the conductive body 200 is exposed from the insulator 100 so as to be connected to the capacitance detecting chip.
Advantageously, as shown in fig. 7a, the height of the accommodating cavity 120 is greater than the thickness of the conductive body 200, and the conductive body 200 is disposed at the bottom of the accommodating cavity 120, so that the conductive body 200 can be stably placed in the insulator 100 due to the smaller thickness of the conductive body 200, and the conductive body 200 is prevented from falling out of the accommodating cavity 120 of the insulator 100.
In the following, a foam sensing assembly 101 for an electric cooker according to another embodiment of the present invention is described with reference to fig. 7b, the foam sensing assembly 101 for an electric cooker constituting a capacitive detection means.
As will be understood by those skilled in the art, the capacitive detection device refers to a device that, according to the capacitive sensing principle, when the detected medium is dipped into the detection device, the capacitance of the detection device changes, and the change is converted into a standard current signal, so as to realize the anti-overflow related control.
Specifically, as shown in fig. 7b, the foam sensing assembly 101 for the electric cooker according to the embodiment of the present invention includes a mount 300, a detection sheet 400, a mounting bracket 500, and an elastic member 600.
The mounting base 300 is provided with a groove 310 having an open upper surface. The test strip 400 is disposed within the recess 310. The mounting bracket 500 is detachably snapped on the upper surface of the mounting base 300. The elastic member 600 is disposed between the mounting bracket 500 and the test strip 400, the elastic member 600 is pressed by the mounting bracket 500 into the groove 310, and the elastic member 600 presses the test strip 400 against the bottom wall of the groove 310.
According to the foam sensing assembly 101 for the electric cooker, provided by the embodiment of the invention, the detection sheet 400 and the mounting seat 300 are combined to form a capacitance type detection device, when liquid (such as steam foam) in the electric cooker contacts the part, corresponding to the detection sheet 400, of the lower surface of the mounting seat 300, the overflow signal can be detected, and the cost is lower. In addition, the detection sheet 400 is pressed in the groove 310 by the elastic part 600 and the mounting bracket 500, and the mounting bracket 500 is detachably clamped on the mounting seat 300, so that the detection sheet 400 can be disassembled and assembled only by disassembling and assembling the mounting bracket 500, the method is simple and convenient, and good process assembly performance can be ensured. Therefore, the foam sensing assembly 101 for the electric cooker according to the embodiment of the present invention has the advantages of low cost, easy assembly and disassembly, etc.
As shown in fig. 7b, the foam sensing assembly 101 for the electric cooker according to the embodiment of the present invention includes a mounting base 300, a detection sheet 400, a mounting bracket 500, and an elastic member 600.
Advantageously, the elastic member 600 is formed as a single piece with the mounting bracket 500, which further reduces the number of steps for assembly and disassembly, thereby further facilitating assembly and disassembly.
In some embodiments of the present invention, as shown in fig. 7b, the elastic member 600 may be a spring, which has an upper end connected to the mounting bracket 500 and a lower end abutting against the test strip 400.
Further, the mounting bracket 500 is wound by the upper end of the spring, in other words, the upper end of the spring is rewound into a predetermined shape to constitute the mounting bracket 500, whereby the elastic member 600 and the mounting bracket 500 can be integrated, and the process is simple and the cost is low.
It is understood that in other embodiments of the present invention, when the foam detection device detects the steam foam generated during cooking in the electric cooker, other detection methods, such as an electrode detection method, may also be adopted.
And S102, if steam foam is detected, controlling the electric cooker to stop heating, acquiring the time when the foam detection device continuously detects the foam, and calculating the time T1 when the electric cooker needs to continuously stop heating and the recovery heating power after the electric cooker stops heating according to the time when the foam detection device continuously detects the foam.
It should be noted that, in the cooking process of cooking rice by an electric cooker such as an electric rice cooker, after steam bubbles generated by the electric rice cooker are detected and the electric rice cooker is controlled to stop heating due to continuous accumulation of heat in the cooker, rice water in the cooker cannot fall back immediately due to thermal inertia, a small amount of rice water enters an upper cover steam valve of the electric rice cooker, more rice water enters the steam valve when the heat in the cooker is accumulated, and the capacity of the steam valve is limited, so that if the heat in the cooker is not returned in time, the electric cooker is also in danger of overflowing.
Therefore, if the steam foam generated by the electric cooker during cooking is detected, the heating stop time of the electric cooker is controlled according to the thermal inertia of the electric cooker, so that the rice water in the steam valve can completely fall back within the stop time, and the electric cooker is prevented from overflowing.
Specifically, in the method for controlling anti-overflow heating of an electric cooker according to the embodiment of the present invention, if the foam detection device detects steam foam, the electric cooker is controlled to stop heating, the foam duration time closely related to thermal inertia continuously detected by the foam detection device is obtained, and the time T1 for which the electric cooker needs to stop heating continuously and/or the heating recovery power after the electric cooker stops heating is calculated based on the continuously detected foam time. Wherein, the time for continuously detecting the foam can be obtained by timing through a timer.
Specifically, the longer the acquired time for continuously detecting the foam, the greater the heating power of the electric cooker before stopping heating, the greater the thermal inertia corresponding to the electric cooker, and therefore, the longer the calculated time T1 for the electric cooker to continue to stop heating, the smaller the heating power recovered after stopping heating of the electric cooker; the shorter the acquired time for continuously detecting the foam is, the smaller the heating power of the electric cooker before stopping heating is, and the smaller the thermal inertia corresponding to the electric cooker is, so that the calculated time T1 for the electric cooker to need to continuously stop heating is shorter, and the larger the heating power recovery after stopping heating of the electric cooker can be.
It should be noted that, in different cases, the way of calculating the time T1 for the electric cooker to continuously stop heating and the way of recovering the heating power after the electric cooker stops heating are different according to the time for continuously detecting the foam, and in order to describe more clearly the specific implementation process of calculating the time T1 for the electric cooker to continuously stop heating and the recovering the heating power after the electric cooker stops heating according to the time for continuously detecting the foam, the following description is made by way of example:
as an implementation manner, fig. 8 is a flowchart of an anti-overflow heating control method for an electric cooker according to another embodiment of the present invention, and as shown in fig. 8, in the step S102, calculating a time T1 for the electric cooker to continue to stop heating and a heating power recovery after the electric cooker stops heating according to a time for the foam detection device to continuously detect foam includes:
s201, judging whether the time t for the foam detection device to continuously detect the foam is less than a first preset time.
Specifically, a first preset time, for example, 500 milliseconds, is calibrated in advance according to a large number of experiments, so as to determine whether the heating power of the electric cooking device before the electric cooking device stops heating is large when the electric cooking device is about to overflow by determining whether the time t for the foam detection device to continuously detect the foam is less than the first preset time.
S202, if T is smaller than a first preset time, taking a first time threshold value as time T1 for the electric cooker to continuously stop heating, and taking heating power of the electric cooker before the electric cooker stops heating as recovery heating power.
The first time threshold is calibrated according to a large number of experiments, for example, the first time threshold is greater than or equal to 5 seconds, and the rice water in the steam valve can be ensured to completely fall back within the first time threshold.
Specifically, if T is less than the first preset time, it indicates that when the electric cooker is about to overflow, boiling is not severe, and the heating power of the corresponding electric cooker before the electric cooker stops heating is not large, so that the first time threshold value can be used as the time T1 for the electric cooker to continue to stop heating, and the heating power of the electric cooker before the electric cooker stops heating is used as the heating recovery power, so that when the continuous heating stop time reaches T1, the heating power of the electric cooker before the electric cooker stops heating is used as the heating recovery power to heat the electric cooker, sufficient boiling of food is ensured, the mouthfeel of cooked food is high, and the cooking effect of the electric cooker is improved.
Based on the above description, it should be understood that in practical applications, the heating power of the electric cooker before stopping heating may be small, which may result in insufficient boiling of the cooked food after the heating is resumed, and therefore, it is also necessary to determine whether the resumed heating power P1 is less than the preset minimum heating power P2.
The minimum heating power P2 is calibrated according to a number of experiments, such as the minimum power for keeping the cooked food fully boiled.
Specifically, when the time for the electric cooker to continue stopping heating reaches T1, it is determined whether the resuming heating power P1 is less than the preset minimum heating power P2, so that if the resuming heating power P1 is less than the preset minimum heating power P2, the electric cooker is controlled to perform the heating operation at the preset minimum heating power P2 in order to ensure sufficient boiling of the cooked food.
And S203, if T is greater than or equal to the first preset time, the time T1 that the electric cooker needs to continuously stop heating is T multiplied by a, and the heating power P1 is P multiplied by b, wherein P is the heating power of the electric cooker before the electric cooker stops heating or the rated power of the electric cooker, and a and b are preset coefficients.
Specifically, if t is greater than or equal to the first preset time, it indicates that when the electric cooker is about to overflow, the boiling in the pot is severe, the heating power of the corresponding electric cooker before the electric cooker stops heating is large, the electric cooker needs a long time for continuing to stop heating, and the electric cooker needs a small heating power for recovery.
Specifically, if T is greater than or equal to a first preset time, the time T1 for the electric cooker to continue stopping heating is T × a, and the heating power P1 is P × b, where P is the heating power of the electric cooker before stopping heating or the rated power of the electric cooker, a and b are preset coefficients calibrated according to a large number of experiments, and preferably, a is an arbitrary number greater than 1, and b is an arbitrary number less than 1.
And S103, controlling the electric cooker to continuously stop heating until the time for continuously stopping heating of the electric cooker reaches T1, and controlling the electric cooker to perform heating operation by recovering the heating power.
Specifically, after the time T1 that the electric cooker needs to continuously stop heating and the heating power recovery after the electric cooker stops heating are calculated according to the time that the foam detection device continuously detects the foam, the electric cooker is controlled to continuously stop heating until the time that the electric cooker continuously stops heating reaches T1, and the electric cooker is controlled to perform heating operation by the heating power recovery. Therefore, the electric cooker can be stopped heating within proper heating stopping time according to the specific situation when the electric cooker is about to overflow, and the electric cooker is controlled to be heated again with proper heating resuming power, so that the cooked food is fully boiled.
It should be emphasized that the implementation of the above steps S101 to S103 may be performed based on the first detection of the steam foam generated when the electric cooking device cooks, however, in practical applications, when the steam foam generated by the electric cooking device is detected, the foam may not be detected for the first time by the foam detecting device, and therefore, it is necessary to determine whether the heating power before the electric cooking device stops heating is appropriate according to the length of the interval time for about overflowing of the electric cooking device (i.e. the length of the interval time for continuously detecting the foam) which is continuously detected.
Specifically, when the electric cooker is about to overflow, if the electric cooker is not about to overflow for the first time, the interval between two consecutive detections of the overflow of the electric cooker, that is, the interval between two consecutive detections of the steam bubbles, is obtained.
And comparing the interval time of the two times of detection of the impending overflow of the electric cooker with a second preset time to determine whether the heating power of the electric cooker before the heating stop is proper or not corresponding to the impending overflow of the electric cooker, wherein the second preset time is calibrated according to a large number of experiments, if the interval time of the two times of detection of the impending overflow of the electric cooker is greater than the second preset time, the heating power of the electric cooker before the heating stop is smaller, and if the interval time of the two times of detection of the impending overflow of the electric cooker is less than or equal to the second preset time, the heating power of the electric cooker before the heating stop can enable the cooked food to be fully boiled, and preferably, the second preset time is greater than or equal to 30 s.
Specifically, when the interval time is greater than the second preset time, it indicates that the heating power of the electric cooker before the heating is stopped is small, and then the electric cooker is controlled to resume heating by using the heating power of the electric cooker before the heating is stopped as the resuming heating power, so that the cooked food may not be sufficiently boiled, and therefore, when the electric cooker is controlled to stop heating until the time of stopping heating of the electric cooker reaches the second time threshold, for example, 5 seconds or more, the heating power of the electric cooker before the heating is stopped is increased, and the electric cooker is controlled to resume heating operation by using the increased heating power.
The second time threshold is calibrated according to a large number of experiments, and the rice water in the steam valve can be ensured to completely fall back within the second time threshold, so that the electric cooker is prevented from overflowing.
In addition, the above-mentioned manner of increasing the heating power of the electric cooker before the heating stop is different according to different situations, for example, the fixed power may be increased on the basis of the heating power of the electric cooker before the heating stop, for example, the fixed power may be increased by 20W. For another example, the electric cooker may be increased by a predetermined ratio of the heating power before the electric cooker stops heating, for example, by 10% of the heating power before the electric cooker stops heating, based on the heating power before the electric cooker stops heating.
Further, in order to describe the anti-overflow heating control method in the embodiment of the present invention more clearly, the following description will be given by way of example, in combination with specific situations, of the whole implementation process of the anti-overflow heating control method in the embodiment of the present invention, and the following description is provided:
in this example, the time interval between two detections of impending overflow of the electric cooker is T2, the second preset time is T3, the second time threshold is T4, the time for continuous detection of foam is T, the first preset time is 500ms, the first time threshold is T5, the time for stopping heating is T1, a and b are preset coefficients, the heating power for recovery is P1, and the preset minimum heating power is P2.
Fig. 9 is a flowchart of an anti-overflow heating control method of an electric cooker according to still another embodiment of the present invention, as shown in fig. 9, when steam bubbles generated during cooking of the electric cooker is detected (S301), it is determined whether steam bubbles generated during cooking of the electric cooker is detected for the first time (S302), and if not, it is determined whether an interval time T2 during which steam bubbles are detected twice consecutively is greater than a second preset time T3(S303), wherein if T2 is not greater than T3, a timer corresponding to the interval time T2 is cleared to count again, and the following step S307 is entered, if T2 is greater than T3, the timer corresponding to the interval time T2 is cleared to count again, and the electric cooker is controlled to stop heating until the stop heating time of the electric cooker reaches a second time threshold T4(S304), and the heating power before the electric cooker stops heating is increased, the electric cooker is controlled to perform heating operation with the increased heating power (S305), and after the heating operation is completed, the operation returns to the main routine (S306).
After the step S302, if the steam foam is detected for the first time, the electric cooker is controlled to stop heating, and the time t for continuously detecting the foam is obtained (S307), and then it is determined whether the time t for continuously detecting the foam by the foam detecting device is less than 500ms (S308).
If the time t of the foam detection device continuously detecting the foam is less than 500ms, clearing a timer corresponding to the time t of continuously detecting the foam, controlling the electric cooker to stop heating for a time period of t5 (S309), controlling the electric cooker to heat by taking the heating power before the electric cooker stops heating as the heating power recovery after controlling the electric cooker to stop heating for t5 (S310), and returning to the main program after heating is finished (S306).
If the time T of the foam detection device continuously detecting the foam is not less than 500ms, clearing a timer corresponding to the time T of continuously detecting the foam, calculating the time T1 of continuously stopping heating to be T × a (S311), starting a timer related to the time T1 of stopping heating to time the time T1 of stopping heating (S312), judging whether the time of continuously stopping heating counted by the timer reaches T1(S313), returning to the step S312 if the time of continuously stopping heating counted by the timer does not reach T1, clearing the timer related to the time T1 of stopping heating if the time of stopping heating reaches T1, and performing heating control on the electric cooker by taking P1 to be P × b as the recovery heating power (S314).
Further, in order to ensure sufficient heating of the cooked food, it is determined whether the heating power P1 is lower than the preset minimum heating power P2(S315), and if the heating power P1 is lower than the preset minimum heating power P2, the electric cooker is controlled to perform heating operation with the preset minimum heating power P2 (S316), and after heating is completed, the main routine is returned to (S306). If the heating power P1 is not less than the predetermined minimum heating power P2, the electric cooker is controlled to perform heating operation by the heating power P1 (S317), and after the heating operation is completed, the main routine is returned to (S306).
Based on the above description, it should be emphasized that the electric cooker is not limited to cooking rice, but may cook porridge, soup, etc. in some embodiments, for convenience of description, rice soup is used as the soup for cooking food.
In summary, according to the anti-overflow heating control method of the electric cooker in the embodiment of the present invention, after the electric cooker enters the boiling stage, the foam detection device detects the foam of steam generated during cooking by the electric cooker, if the foam of steam is detected, the electric cooker is controlled to stop heating, the time when the foam detection device continuously detects the foam is obtained, the time T1 when the electric cooker needs to continuously stop heating and the heating recovery power after the electric cooker stops heating are calculated according to the time when the foam detection device continuously detects the foam, and then when the time when the electric cooker continuously stops heating reaches T1, the electric cooker is controlled to perform heating operation with the heating recovery power, so that the heating stop time and the heating recovery power after stopping heating can be calculated based on the time when the foam is continuously detected, and thus an appropriate power can be quickly found for heating recovery, the continuous boiling time is effectively prolonged, the full boiling of the food cooked by the electric cooker is ensured, the mouthfeel of the cooked food is improved, and the overflow phenomenon is effectively avoided.
In order to implement the above embodiments, the present invention further provides an anti-overflow heating control device of an electric cooking device, fig. 10 is a block diagram of the anti-overflow heating control device of the electric cooking device according to an embodiment of the present invention, and as shown in fig. 10, the anti-overflow heating control device of the electric cooking device includes a detection module 1000 and a main control module 40.
Wherein, after the electric cooker enters the boiling stage, the detecting module 1000 detects the steam foam generated during cooking of the electric cooker through the foam detecting device 10, and generates a foam detecting signal when the foam detecting device detects the steam foam.
If the detection module 1000 outputs the foam detection signal to the main control module 40, the main control module 40 controls the electric cooker to stop heating, obtains the time when the foam detection device continuously detects foam, and calculates the heating recovery power of the electric cooker after the electric cooker stops heating according to the time when the foam detection device continuously detects foam. The main control module 40 is further configured to control the electric cooking device to perform heating operation with the heating resuming power when the time that the electric cooking device stops heating reaches a set time T1.
According to an embodiment of the invention, when the main control module calculates the heating recovery power of the electric cooker after stopping heating according to the time of the foam detection device continuously detecting foam, the main control module judges whether the time t of the foam detection device continuously detecting foam is less than a first preset time, wherein if the time t is less than the first preset time, the main control module takes the heating power of the electric cooker before stopping heating as the heating recovery power; if t is greater than or equal to the first preset time, the main control module calculates the heating power recovery P1 as P × b, where P is the heating power of the electric cooking device before the electric cooking device stops heating or the rated power of the electric cooking device, and b is a preset coefficient.
Specifically, in one example of the present invention, b is less than 1.
According to an embodiment of the present invention, the main control module further determines whether the heating power recovery P1 is less than a preset minimum heating power P2, wherein if the heating power recovery P1 is less than the preset minimum heating power P2, the main control module controls the electric cooker to perform the heating operation with the preset minimum heating power P2.
According to an embodiment of the present invention, when the foam detection device detects the steam foam, the main control module is further configured to obtain an interval time between two consecutive times of detection of the steam foam by the foam detection device according to the received foam detection signal, and when the interval time is greater than a second preset time, the main control module controls the electric cooker to stop heating, until the heating stop time of the electric cooker reaches a second time threshold, the main control module increases the heating power of the electric cooker before the electric cooker stops heating, and controls the electric cooker to perform heating operation with the increased heating power.
According to the anti-overflow heating control device of the electric cooker, after the electric cooker enters a boiling stage, the detection module detects steam foam generated during cooking of the electric cooker through the foam detection device, and generates a foam detection signal when the foam detection device detects the steam foam, if the detection module outputs the foam detection signal to the main control module, the main control module controls the electric cooker to stop heating, obtains the continuous foam detection time of the foam detection device, calculates the heating recovery power of the electric cooker after the electric cooker stops heating according to the continuous foam detection time of the foam detection device, and then when the heating stop time of the electric cooker reaches the set time T1, the main control module controls the electric cooker to perform heating work by recovering the heating power. Therefore, the heating recovery power after heating stopping can be calculated based on the time of continuously detecting the foam, so that the proper power can be quickly found for heating recovery, the continuous boiling time is effectively prolonged, the full boiling of the food cooked by the electric cooker is ensured, the mouthfeel of the cooked food is improved, and the overflow phenomenon of the electric cooker can be effectively prevented.
According to another embodiment of the present invention, the main control module 40 controls the electric cooker to stop heating when receiving the foam detection signal, and obtains the time when the foam detection device continuously detects foam, and calculates the time T1 when the electric cooker needs to continue to stop heating and the heating recovery power after the electric cooker stops heating according to the time when the foam detection device continuously detects foam.
In an embodiment of the present invention, when the main control module 40 calculates the time T1 that the electric cooker needs to continue to stop heating and the heating power recovery after the electric cooker stops heating according to the time when the foam detection device continuously detects foam, it is determined whether the time T when the foam detection device continuously detects foam is less than a first preset time, wherein,
if T is less than the first preset time, the main control module 40 takes the first time threshold as time T1 when the electric cooker needs to continue to stop heating, and takes the heating power of the electric cooker before stopping heating as the heating recovery power;
if T is greater than or equal to the first preset time, the main control module 40 calculates time T1 that the electric cooker needs to continue to stop heating as T × a, and calculates recovered heating power P1 as P × b, where P is the heating power of the electric cooker before stopping heating or the rated power of the electric cooker, and a and b are preset coefficients. Preferably, the preset coefficient a is greater than 1, and b is less than 1.
Further, the main control module 40 is further configured to control the electric cooker to continue to stop heating until the time when the electric cooker continues to stop heating reaches T1, so as to resume the heating power to control the electric cooker to perform the heating operation.
In an embodiment of the present invention, when the time for the electric cooker to continue stopping heating reaches T1, the main control module 40 further determines whether the heating resuming power P1 is less than the preset minimum heating power P2, wherein if the heating resuming power P1 is less than the preset minimum heating power P2, the main control module 40 controls the electric cooker to perform the heating operation with the preset minimum heating power P2.
Based on the above description, in an embodiment of the present invention, when the electric cooker is about to overflow, the main control module 40 is further configured to obtain an interval time between two consecutive detections of the impending overflow of the electric cooker, and when the interval time is greater than a second preset time, the main control module 40 controls the electric cooker to stop heating until the stop heating time of the electric cooker reaches a second time threshold, increase the heating power of the electric cooker before the stop heating, and control the electric cooker to perform heating operation with the increased heating power.
It should be noted that the above explanation of the anti-overflow heating control method for the electric cooking device is also applicable to the anti-overflow heating control device for the electric cooking device according to the embodiment of the present invention, and is not repeated herein.
In summary, according to the anti-overflow heating control device of the electric cooker in the embodiment of the present invention, after the electric cooker enters the boiling stage, the detection module detects steam bubbles generated during cooking by the electric cooker through the bubble detection device, if the bubble detection device detects steam bubbles, the main control module controls the electric cooker to stop heating when receiving a bubble detection signal, obtains a time when the bubble detection device continuously detects bubbles, calculates a time T1 when the electric cooker needs to continue to stop heating and a heating recovery power after the electric cooker stops heating according to the time when the bubble detection device continuously detects bubbles, and then controls the electric cooker to perform heating operation by recovering the heating power when the time when the electric cooker continues to stop heating reaches T1. Therefore, the heating stopping time and the heating recovering power after the heating stopping can be calculated based on the continuous foam detection time, so that the proper power can be quickly found for recovering the heating, the continuous boiling time can be effectively increased, the full boiling of the food cooked by the electric cooker can be ensured, the mouthfeel of the cooked food can be improved, and the overflow phenomenon can be effectively prevented.
In order to implement the above embodiment, the present invention further provides an electric cooking device, fig. 11 is a block diagram of an electric cooking device according to an embodiment of the present invention, and as shown in fig. 11, the electric cooking device according to the embodiment of the present invention includes an anti-overflow heating control apparatus 2000 of the electric cooking device.
For the description of the anti-overflow heating control device 2000 of the electric cooking device, reference may be made to the above-mentioned anti-overflow heating control device of the electric cooking device, and details are not repeated herein.
In summary, according to the electric cooker of the embodiment of the invention, the anti-overflow heating control device can calculate the heating recovery power of the electric cooker after the electric cooker stops heating based on the time of continuously detecting the foam, so that the proper power can be quickly found for heating recovery, the continuous boiling time can be effectively increased, the sufficient boiling of the food cooked by the electric cooker can be ensured, the taste of the cooked food can be improved, and the overflow phenomenon of the electric cooker can be effectively prevented.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (7)

1. An anti-overflow heating control method of an electric cooker is characterized by comprising the following steps:
after the electric cooker enters a boiling stage, detecting steam foam generated during cooking of the electric cooker through a foam detection device;
if the steam foam is detected, controlling the electric cooker to stop heating, acquiring the time for the foam detection device to continuously detect the foam, and calculating the heating recovery power of the electric cooker after the electric cooker stops heating according to the time for the foam detection device to continuously detect the foam;
when the time for stopping heating of the electric cooker reaches a set time T1, controlling the electric cooker to perform heating operation at the heating recovery power;
wherein, the calculating the heating power recovery after the electric cooker stops heating according to the time when the foam detection device continuously detects the foam comprises the following steps:
judging whether the time t for the foam detection device to continuously detect the foam is less than a first preset time or not;
if t is less than the first preset time, taking the heating power of the electric cooker before the electric cooker stops heating as the recovery heating power;
if t is greater than or equal to the first preset time, the recovered heating power P1 is P × b, where P is the heating power of the electric cooker before the electric cooker stops heating or the rated power of the electric cooker, b is a preset coefficient, and b is less than 1.
2. The anti-overflow heating control method of an electric cooker as claimed in claim 1, further judging whether the recovery heating power P1 is less than a preset minimum heating power P2, wherein,
if the recovery heating power P1 is less than the preset minimum heating power P2, the electric cooker is controlled to perform heating operation at the preset minimum heating power P2.
3. The anti-overflow heating control method of an electric cooker according to claim 1, wherein when the foam detecting means detects the steam foam, an interval time between two consecutive detections of the steam foam is further obtained, and when the interval time is greater than a second preset time, the electric cooker is controlled to stop heating until the heating stop time of the electric cooker reaches a second time threshold, the heating power of the electric cooker before the heating stop time is increased, and the electric cooker is controlled to perform heating operation with the increased heating power.
4. An anti-overflow heating control device of an electric cooking device is characterized by comprising a detection module and a main control module, wherein,
after the electric cooker enters a boiling stage, the detection module detects steam foam generated during cooking of the electric cooker through a foam detection device and generates a foam detection signal when the foam detection device detects the steam foam;
if the detection module outputs the foam detection signal to the main control module, the main control module controls the electric cooker to stop heating, obtains the time for the foam detection device to continuously detect foam, and calculates the heating recovery power of the electric cooker after the electric cooker stops heating according to the time for the foam detection device to continuously detect foam;
the main control module is further used for controlling the electric cooking device to perform heating operation by the heating recovery power when the time for stopping heating of the electric cooking device reaches a set time T1;
wherein, when the main control module calculates the heating power recovery of the electric cooker after the electric cooker stops heating according to the time when the foam detection device continuously detects the foam, the main control module judges whether the time t when the foam detection device continuously detects the foam is less than a first preset time, wherein,
if t is less than the first preset time, the main control module takes the heating power of the electric cooker before the electric cooker stops heating as the heating recovery power;
if t is greater than or equal to the first preset time, the main control module calculates the heating power recovery P1 as P × b, where P is the heating power of the electric cooking device before the electric cooking device stops heating or the rated power of the electric cooking device, b is a preset coefficient, and b is less than 1.
5. The anti-overflow heating control apparatus of an electric cooker as claimed in claim 4, wherein the main control module further determines whether the recovery heating power P1 is less than a preset minimum heating power P2, wherein,
if the recovery heating power P1 is less than the preset minimum heating power P2, the main control module controls the electric cooker to perform heating operation with the preset minimum heating power P2.
6. The overflow prevention heating control device of an electric cooker as claimed in claim 4, wherein when the foam detection device detects the steam foam, the main control module is further configured to obtain an interval time between two consecutive detections of the steam foam by the foam detection device according to the received foam detection signal, and when the interval time is greater than a second preset time, the main control module controls the electric cooker to stop heating until the heating stop time of the electric cooker reaches a second time threshold, the heating power of the electric cooker before the heating stop is increased, and the electric cooker is controlled to perform heating operation by the increased heating power.
7. An electric cooker comprising the anti-overflow heating control device of the electric cooker of any one of claims 4 to 6.
CN201710034748.7A 2017-01-18 2017-01-18 Electric cooker and anti-overflow heating control method and device thereof Active CN108309020B (en)

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CN112704376B (en) * 2019-10-24 2022-04-05 佛山市顺德区美的电热电器制造有限公司 Cooking method, device, equipment and storage medium
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