CN111102610B - Operation control method, device, cooking appliance and computer readable storage medium - Google Patents
Operation control method, device, cooking appliance and computer readable storage medium Download PDFInfo
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- CN111102610B CN111102610B CN201811261769.3A CN201811261769A CN111102610B CN 111102610 B CN111102610 B CN 111102610B CN 201811261769 A CN201811261769 A CN 201811261769A CN 111102610 B CN111102610 B CN 111102610B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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Abstract
The invention provides an operation control method, an operation control device, a cooking appliance and a computer readable storage medium, wherein the operation control method comprises the following steps: before heating the liquid with the specified specific heat capacity to a first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid; when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining the liquid amount change in real time according to the temperature rising rate; the heating power is adjusted according to the initial liquid amount and the liquid amount change. By the technical scheme of the invention, the occurrence of overflow is effectively reduced, and the cooking effect and the use experience of a user are improved.
Description
Technical Field
The invention relates to the technical field of cooking, in particular to an operation control method, an operation control device, a cooking appliance and a computer readable storage medium.
Background
The induction cooker is an important cooking appliance, and is widely popularized due to the advantages of simple control mode, diversified functions, separable pot body and heating panel, no open fire danger and the like.
However, in order to improve the universality and the production cost of the induction cooker, the pot of the induction cooker is usually a single-layer pot body, and the pot cover is a separable glass cover or a metal cover, so that the anti-overflow detection device is not convenient to arrange on the pot cover and the pot cover, the overflow condition is caused to be high, and the use experience of a user is seriously influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, it is an object of the present invention to provide an operation control method.
Another object of the present invention is to provide an operation control device.
Another object of the present invention is to provide a cooking appliance.
It is another object of the present invention to provide a computer-readable storage medium.
In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided an operation control method including: before heating the liquid with the specified specific heat capacity to a first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid; when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining the liquid amount change in real time according to the temperature rising rate; the heating power is adjusted according to the initial liquid amount and the liquid amount change.
In the technical scheme, before the liquid with the specified specific heat capacity is heated to the first preset temperature, the liquid does not generate steam or overflow, and the temperature rising rate of the liquid and the liquid amount are approximately linearly related at the moment, so that the initial liquid amount can be accurately determined by detecting the temperature rising rate.
In addition, when the liquid is continuously heated to be close to the second preset temperature, water vapor begins to be generated at the moment, the temperature rising rate is reduced due to the fact that partial heat is taken away by the water vapor, the liquid amount is reduced mainly due to volatilization of the water vapor, and therefore corresponding liquid amount change can be determined in real time according to the temperature rising rate.
Finally, the heating power is adjusted by combining the initial liquid amount and the liquid amount change, whether overflow occurs or not can be determined according to the temperature change and the residual liquid amount, the heating power is correspondingly adjusted, so that the overflow is reduced, an overflow sensor is not required to be arranged, and the overflow condition can be pertinently inhibited.
In any of the above technical solutions, preferably, before heating the liquid with the specified specific heat capacity to the first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid, specifically including: recording a temperature-time curve of the liquid in real time in the process of heating the liquid to a first preset temperature according to a first preset power; calculating the slope of the temperature-time curve before the temperature is heated to a first preset temperature in real time, and determining the slope as a heating rate; and determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time.
According to the technical scheme, the slope of the temperature-time curve before the temperature is heated to the first preset temperature is calculated in real time, the temperature rise rate is determined, the initial liquid amount is determined according to the slope, the specified specific heat capacity, the heating power and the heating time, the accuracy is high, and the control mode is reliable.
Wherein the content of the first and second substances,based on thermodynamic formula
Further to the solution of the present application, p (t) represents the real-time power value,
representing the integration of the power over the time period t1 to t2, the result of the integration being the total heat heated over the time period t1 to t2, m representing the mass of the liquid, and Δ t representing the temperature change of the liquid over the time period t1 to t2, then if the heating power is constant during the heating phase preceding the first predetermined temperature, i.e. the first predetermined power mentioned above, the mass of the liquid can be accurately determined from the temperature change according to the thermodynamic equation mentioned above.
In any of the above technical solutions, preferably, when the liquid is continuously heated until the temperature rise rate decreases and the temperature of the liquid approaches to the second preset temperature, determining the liquid amount change in real time according to the temperature rise rate, specifically including: when the temperature of the liquid is detected to reach a first preset temperature, the first preset power is increased to a second preset power; when the liquid is continuously heated according to the second preset power, detecting the variation trend of the temperature rising rate according to a preset period; when the change trend of the temperature rise rate is detected to be reduced along with the increase of time, calculating the difference between the temperature of the liquid and a second preset temperature in real time; and in the preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid quantity change in real time according to the temperature rising rate.
In the technical scheme, when the temperature of the liquid is detected to reach the first preset temperature, the first preset power is increased to the second preset power, so that the heating efficiency can be further improved, and at the moment, a large amount of water vapor is generated to reduce the liquid amount, on one hand, since the water vapor takes away a large amount of heat energy, it can be detected that the trend of the temperature rise rate is reduced along with the increase of time, on the other hand, the liquid is violently overturned and even overflows when the water vapor is generated, and the second preset temperature is just close to the temperature at which the liquid overflows, therefore, the temperature difference between the temperature of the detected liquid and the second preset temperature is always less than or equal to the preset temperature difference, the liquid amount change is determined in real time according to the temperature rising rate, and the remaining liquid amount is detected in real time, and the overflow or dry burning of the liquid is reduced by adjusting the power.
In any of the above technical solutions, preferably, the adjusting the heating power according to the initial liquid amount and the liquid amount change specifically includes: calculating the ratio between the change in the amount of liquid and the initial amount of liquid; the heating power is controlled to be reduced according to the ratio.
In the technical scheme, the ratio between the liquid amount change and the initial liquid amount is calculated, the rate of generating water vapor can be determined, the severe boiling degree of the liquid can be indirectly determined, and the overflow condition can be effectively reduced by controlling the reduction of the heating power according to the ratio.
In any of the above technical solutions, preferably, the adjusting the heating power according to the initial liquid amount and the liquid amount change specifically includes: calculating the difference between the initial liquid amount and the accumulated liquid amount change to determine the residual liquid amount; judging whether the residual liquid amount is less than or equal to a preset residual liquid amount or not; when the residual liquid amount is judged to be less than or equal to the preset residual liquid amount, controlling the heating power to be reduced to zero; and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to reduce step by step according to the preset offset.
In this technical scheme, through judging whether the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, liquid is less more fast its intensification promptly, the more probably takes place to spill over, consequently, when judging that the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, control heating power reduces to zero, directly stops to liquid heating promptly, and when judging that the surplus liquid measure is greater than predetermineeing the surplus liquid measure, control heating power marching type according to predetermineeing the offset and reduce, through reducing heating power comparatively gently promptly, can reduce the ripple current in the control circuit, simultaneously, also can avoid spilling over the emergence.
According to an aspect of the second aspect of the present invention, there is provided an operation control device including: the determining unit is used for determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid before the liquid with the specified specific heat capacity is heated to a first preset temperature; the determination unit is further configured to: when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining the liquid amount change in real time according to the temperature rising rate; the operation control device further includes: and the power regulating unit is used for regulating the heating power according to the initial liquid amount and the liquid amount change.
In the technical scheme, before the liquid with the specified specific heat capacity is heated to the first preset temperature, the liquid does not generate steam or overflow, and the temperature rising rate of the liquid and the liquid amount are approximately linearly related at the moment, so that the initial liquid amount can be accurately determined by detecting the temperature rising rate.
In addition, when the liquid is continuously heated to be close to the second preset temperature, water vapor begins to be generated at the moment, the temperature rising rate is reduced due to the fact that partial heat is taken away by the water vapor, the liquid amount is reduced mainly due to volatilization of the water vapor, and therefore corresponding liquid amount change can be determined in real time according to the temperature rising rate.
Finally, the heating power is adjusted by combining the initial liquid amount and the liquid amount change, whether overflow occurs or not can be determined according to the temperature change and the residual liquid amount, the heating power is correspondingly adjusted, so that the overflow is reduced, an overflow sensor is not required to be arranged, and the overflow condition can be pertinently inhibited.
In any of the above technical solutions, preferably, the determining unit specifically includes: the recording subunit is used for recording a temperature-time curve of the liquid in real time in the process of heating the liquid to a first preset temperature according to a first preset power; the calculating subunit is used for calculating the slope of the temperature-time curve before the temperature is heated to a first preset temperature in real time and determining the slope as a heating rate; and the quantifying subunit is used for determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time length.
According to the technical scheme, the slope of the temperature-time curve before the temperature is heated to the first preset temperature is calculated in real time, the temperature rise rate is determined, the initial liquid amount is determined according to the slope, the specified specific heat capacity, the heating power and the heating time, the accuracy is high, and the control mode is reliable.
Wherein the thermodynamic formula is based
Further to the solution of the present application, p (t) represents the real-time power value,
representing the integration of the power over the time period t1 to t2, the result of the integration being the total heat heated over the time period t1 to t2, m representing the mass of the liquid, and Δ t representing the temperature change of the liquid over the time period t1 to t2, then if the heating power is constant during the heating phase preceding the first predetermined temperature, i.e. the first predetermined power mentioned above, the mass of the liquid can be accurately determined from the temperature change according to the thermodynamic equation mentioned above.
In any of the above technical solutions, preferably, the determining unit further includes: the increasing subunit is used for increasing the first preset power to a second preset power when the temperature of the liquid is detected to reach a first preset temperature; the detection subunit is used for detecting the variation trend of the heating rate according to a preset period when the liquid is continuously heated according to a second preset power; the difference subunit is used for calculating the difference between the temperature of the liquid and a second preset temperature in real time when the change trend of the temperature rise rate is detected to be reduced along with the increase of time; the detection subunit is further configured to: and in the preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid quantity change in real time according to the temperature rising rate.
In the technical scheme, when the temperature of the liquid is detected to reach the first preset temperature, the first preset power is increased to the second preset power, so that the heating efficiency can be further improved, and at the moment, a large amount of water vapor is generated to reduce the liquid amount, on one hand, since the water vapor takes away a large amount of heat energy, it can be detected that the trend of the temperature rise rate is reduced along with the increase of time, on the other hand, the liquid is violently overturned and even overflows when the water vapor is generated, and the second preset temperature is just close to the temperature at which the liquid overflows, therefore, the temperature difference between the temperature of the detected liquid and the second preset temperature is always less than or equal to the preset temperature difference, the liquid amount change is determined in real time according to the temperature rising rate, and the remaining liquid amount is detected in real time, and the overflow or dry burning of the liquid is reduced by adjusting the power.
In any of the above technical solutions, preferably, the power adjusting unit specifically includes: a proportional subunit for calculating a ratio between the change in the liquid amount and the initial liquid amount; and the reducing subunit is used for controlling the heating power to be reduced according to the ratio.
In the technical scheme, the ratio between the liquid amount change and the initial liquid amount is calculated, the rate of generating water vapor can be determined, the severe boiling degree of the liquid can be indirectly determined, and the overflow condition can be effectively reduced by controlling the reduction of the heating power according to the ratio.
In any of the above technical solutions, preferably, the power adjusting unit further includes: a remaining subunit for calculating a difference between the initial liquid amount and the accumulated liquid amount change, and determining as a remaining liquid amount; a judging subunit, configured to judge whether the remaining liquid amount is less than or equal to a preset remaining liquid amount; the control subunit is used for controlling the heating power to be reduced to zero when the residual liquid amount is judged to be less than or equal to the preset residual liquid amount; the control subunit is further to: and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to reduce step by step according to the preset offset.
In this technical scheme, through judging whether the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, liquid is less more fast its intensification promptly, the more probably takes place to spill over, consequently, when judging that the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, control heating power reduces to zero, directly stops to liquid heating promptly, and when judging that the surplus liquid measure is greater than predetermineeing the surplus liquid measure, control heating power marching type according to predetermineeing the offset and reduce, through reducing heating power comparatively gently promptly, can reduce the ripple current in the control circuit, simultaneously, also can avoid spilling over the emergence.
According to an aspect of the third aspect of the present invention, there is provided a cooking appliance including: the operation control device defined in any one of the above technical solutions.
According to an aspect of the fourth aspect of the present invention, there is provided a computer-readable storage medium on which a computer program is stored, the computer program, when executed, implementing the operation control method defined in any one of the above aspects.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;
FIG. 2 shows a schematic block diagram of an operation control device according to an embodiment of the present invention;
fig. 3 shows a schematic block diagram of a cooking appliance according to an embodiment of the present invention;
fig. 4 shows a hardware configuration diagram of a cooking appliance according to another embodiment of the present invention;
FIG. 5 shows a schematic flow diagram of an operation control method according to another embodiment of the invention;
FIG. 6 shows a schematic diagram of a temperature time curve of an operation control method according to an embodiment of the invention;
fig. 7 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The first embodiment is as follows:
fig. 1 shows a schematic flow diagram of an operation control method according to an embodiment of the invention.
As shown in fig. 1, an operation control method according to an embodiment of the present invention includes: step S102, before heating the liquid with the specified specific heat capacity to a first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid; step S104, when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining the liquid amount change in real time according to the temperature rising rate; step S106, adjusting the heating power according to the initial liquid amount and the liquid amount change.
In the technical scheme, before the liquid with the specified specific heat capacity is heated to the first preset temperature, the liquid does not generate steam or overflow, and the temperature rising rate of the liquid and the liquid amount are approximately linearly related at the moment, so that the initial liquid amount can be accurately determined by detecting the temperature rising rate.
In addition, when the liquid is continuously heated to be close to the second preset temperature, water vapor begins to be generated at the moment, the temperature rising rate is reduced due to the fact that partial heat is taken away by the water vapor, the liquid amount is reduced mainly due to volatilization of the water vapor, and therefore corresponding liquid amount change can be determined in real time according to the temperature rising rate.
Finally, the heating power is adjusted by combining the initial liquid amount and the liquid amount change, whether overflow occurs or not can be determined according to the temperature change and the residual liquid amount, the heating power is correspondingly adjusted, so that the overflow is reduced, an overflow sensor is not required to be arranged, and the overflow condition can be pertinently inhibited.
In any of the above technical solutions, preferably, before heating the liquid with the specified specific heat capacity to the first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid, specifically including: recording a temperature-time curve of the liquid in real time in the process of heating the liquid to a first preset temperature according to a first preset power; calculating the slope of the temperature-time curve before the temperature is heated to a first preset temperature in real time, and determining the slope as a heating rate; and determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time.
According to the technical scheme, the slope of the temperature-time curve before the temperature is heated to the first preset temperature is calculated in real time, the temperature rise rate is determined, the initial liquid amount is determined according to the slope, the specified specific heat capacity, the heating power and the heating time, the accuracy is high, and the control mode is reliable.
Wherein the thermodynamic formula is based
Further to the solution of the present application, p (t) represents the real-time power value,
representing the integration of the power over the time period t1 to t2, the result of the integration being the total heat heated over the time period t1 to t2, m representing the mass of the liquid, and Δ t representing the temperature change of the liquid over the time period t1 to t2, then if the heating power is constant during the heating phase preceding the first predetermined temperature, i.e. the first predetermined power mentioned above, the mass of the liquid can be accurately determined from the temperature change according to the thermodynamic equation mentioned above.
In any of the above technical solutions, preferably, when the liquid is continuously heated until the temperature rise rate decreases and the temperature of the liquid approaches to the second preset temperature, determining the liquid amount change in real time according to the temperature rise rate, specifically including: when the temperature of the liquid is detected to reach a first preset temperature, the first preset power is increased to a second preset power; when the liquid is continuously heated according to the second preset power, detecting the variation trend of the temperature rising rate according to a preset period; when the change trend of the temperature rise rate is detected to be reduced along with the increase of time, calculating the difference between the temperature of the liquid and a second preset temperature in real time; and in the preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid quantity change in real time according to the temperature rising rate.
In the technical scheme, when the temperature of the liquid is detected to reach the first preset temperature, the first preset power is increased to the second preset power, so that the heating efficiency can be further improved, and at the moment, a large amount of water vapor is generated to reduce the liquid amount, on one hand, since the water vapor takes away a large amount of heat energy, it can be detected that the trend of the temperature rise rate is reduced along with the increase of time, on the other hand, the liquid is violently overturned and even overflows when the water vapor is generated, and the second preset temperature is just close to the temperature at which the liquid overflows, therefore, the temperature difference between the temperature of the detected liquid and the second preset temperature is always less than or equal to the preset temperature difference, the liquid amount change is determined in real time according to the temperature rising rate, and the remaining liquid amount is detected in real time, and the overflow or dry burning of the liquid is reduced by adjusting the power.
In any of the above technical solutions, preferably, the adjusting the heating power according to the initial liquid amount and the liquid amount change specifically includes: calculating the ratio between the change in the amount of liquid and the initial amount of liquid; the heating power is controlled to be reduced according to the ratio.
In the technical scheme, the ratio between the liquid amount change and the initial liquid amount is calculated, the rate of generating water vapor can be determined, the severe boiling degree of the liquid can be indirectly determined, and the overflow condition can be effectively reduced by controlling the reduction of the heating power according to the ratio.
In any of the above technical solutions, preferably, the adjusting the heating power according to the initial liquid amount and the liquid amount change specifically includes: calculating the difference between the initial liquid amount and the accumulated liquid amount change to determine the residual liquid amount; judging whether the residual liquid amount is less than or equal to a preset residual liquid amount or not; when the residual liquid amount is judged to be less than or equal to the preset residual liquid amount, controlling the heating power to be reduced to zero; and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to reduce step by step according to the preset offset.
In this technical scheme, through judging whether the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, liquid is less more fast its intensification promptly, the more probably takes place to spill over, consequently, when judging that the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, control heating power reduces to zero, directly stops to liquid heating promptly, and when judging that the surplus liquid measure is greater than predetermineeing the surplus liquid measure, control heating power marching type according to predetermineeing the offset and reduce, through reducing heating power comparatively gently promptly, can reduce the ripple current in the control circuit, simultaneously, also can avoid spilling over the emergence.
Example two:
fig. 2 shows a schematic block diagram of an operation control device according to an embodiment of the present invention.
As shown in fig. 2, an operation control device 200 according to an embodiment of the present invention includes: the determining unit 202 is used for determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid before the liquid with the specified specific heat capacity is heated to a first preset temperature; the determining unit 202 is further configured to: when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining the liquid amount change in real time according to the temperature rising rate; the operation control device 200 further includes: and the power adjusting unit 204 is used for adjusting the heating power according to the initial liquid amount and the liquid amount change.
In the technical scheme, before the liquid with the specified specific heat capacity is heated to the first preset temperature, the liquid does not generate steam or overflow, and the temperature rising rate of the liquid and the liquid amount are approximately linearly related at the moment, so that the initial liquid amount can be accurately determined by detecting the temperature rising rate.
In addition, when the liquid is continuously heated to be close to the second preset temperature, water vapor begins to be generated at the moment, the temperature rising rate is reduced due to the fact that partial heat is taken away by the water vapor, the liquid amount is reduced mainly due to volatilization of the water vapor, and therefore corresponding liquid amount change can be determined in real time according to the temperature rising rate.
Finally, the heating power is adjusted by combining the initial liquid amount and the liquid amount change, whether overflow occurs or not can be determined according to the temperature change and the residual liquid amount, the heating power is correspondingly adjusted, so that the overflow is reduced, an overflow sensor is not required to be arranged, and the overflow condition can be pertinently inhibited.
In any of the above technical solutions, preferably, the determining unit 202 specifically includes: the recording subunit 2022 is configured to record a temperature-time curve of the liquid in real time during the process of heating the liquid to the first preset temperature according to the first preset power; the calculating subunit 2024 is configured to calculate a slope of the temperature-time curve before heating to the first preset temperature in real time, and determine the slope as a temperature rise rate; and the constant quantum unit 2026 is used for determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time length.
According to the technical scheme, the slope of the temperature-time curve before the temperature is heated to the first preset temperature is calculated in real time, the temperature rise rate is determined, the initial liquid amount is determined according to the slope, the specified specific heat capacity, the heating power and the heating time, the accuracy is high, and the control mode is reliable.
Wherein the thermodynamic formula is based
Further to the solution of the present application, p (t) represents the real-time power value,
representing the integration of the power over the time period t1 to t2, the result of the integration being the total heat heated over the time period t1 to t2, m representing the mass of the liquid, and Δ t representing the temperature change of the liquid over the time period t1 to t2, then if the heating power is constant during the heating phase preceding the first predetermined temperature, i.e. the first predetermined power mentioned above, the mass of the liquid can be accurately determined from the temperature change according to the thermodynamic equation mentioned above.
In any of the above technical solutions, preferably, the determining unit 202 further includes: the increasing subunit 2028, configured to increase the first preset power to a second preset power when it is detected that the temperature of the liquid reaches a first preset temperature; the detection subunit 20210 is configured to detect a variation trend of the temperature increase rate according to a preset period when the liquid is continuously heated according to a second preset power; the difference subunit 20212 is configured to calculate a difference between the temperature of the liquid and a second preset temperature in real time when it is detected that the trend of change of the temperature increase rate is decreasing with increasing time; the detection subunit 20210 is further configured to: and in the preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid quantity change in real time according to the temperature rising rate.
In the technical scheme, when the temperature of the liquid is detected to reach the first preset temperature, the first preset power is increased to the second preset power, so that the heating efficiency can be further improved, and at the moment, a large amount of water vapor is generated to reduce the liquid amount, on one hand, since the water vapor takes away a large amount of heat energy, it can be detected that the trend of the temperature rise rate is reduced along with the increase of time, on the other hand, the liquid is violently overturned and even overflows when the water vapor is generated, and the second preset temperature is just close to the temperature at which the liquid overflows, therefore, the temperature difference between the temperature of the detected liquid and the second preset temperature is always less than or equal to the preset temperature difference, the liquid amount change is determined in real time according to the temperature rising rate, and the remaining liquid amount is detected in real time, and the overflow or dry burning of the liquid is reduced by adjusting the power.
In any of the above technical solutions, preferably, the power adjusting unit 204 specifically includes: a ratio example unit 2042 for calculating a ratio between the liquid amount change and the initial liquid amount; a reducing subunit 2044 for controlling the heating power to be reduced according to the ratio.
In the technical scheme, the ratio between the liquid amount change and the initial liquid amount is calculated, the rate of generating water vapor can be determined, the severe boiling degree of the liquid can be indirectly determined, and the overflow condition can be effectively reduced by controlling the reduction of the heating power according to the ratio.
In any of the above technical solutions, preferably, the power adjusting unit 204 further includes: a remaining subunit 2046 for calculating a difference between the initial liquid amount and the accumulated liquid amount change, and determining as a remaining liquid amount; a determining subunit 2048, configured to determine whether the remaining liquid amount is less than or equal to a preset remaining liquid amount; a control subunit 20410, configured to control the heating power to decrease to zero when it is determined that the remaining liquid amount is less than or equal to the preset remaining liquid amount; the control subunit is further to: and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to reduce step by step according to the preset offset.
In this technical scheme, through judging whether the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, liquid is less more fast its intensification promptly, the more probably takes place to spill over, consequently, when judging that the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, control heating power reduces to zero, directly stops to liquid heating promptly, and when judging that the surplus liquid measure is greater than predetermineeing the surplus liquid measure, control heating power marching type according to predetermineeing the offset and reduce, through reducing heating power comparatively gently promptly, can reduce the ripple current in the control circuit, simultaneously, also can avoid spilling over the emergence.
Example three:
fig. 3 shows a schematic block diagram of a cooking appliance according to an embodiment of the present invention.
As shown in fig. 3, a cooking appliance 300 according to an embodiment of the present invention includes: such as the operation control device 200 shown in fig. 2.
The operation control device 200 may be an MCU, a CPU, a DSP, a single chip, an embedded device, and the like, the determination unit 202 may include a general interface, an encoder, a memory, an optical sensor, a communication interface, a weighing unit, a control panel, a decoder, and the like, and the power adjustment unit 204 may include a logic calculation device, a comparator, a power control circuit, and the like.
Example four:
the operation control scheme according to the present invention will be specifically described below with reference to fig. 4 to 7.
Fig. 4 shows a hardware configuration diagram of a cooking appliance according to another embodiment of the present invention.
Fig. 5 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention.
Fig. 6 shows a schematic diagram of a temperature-time curve of an operation control method according to an embodiment of the invention.
As shown in fig. 4, the cooking appliance according to another embodiment of the present invention mainly requires 3 systems for implementing the spill prevention function, and specifically includes: an MCU control system 400, a temperature measurement module 408 and a heating control module 410. The MCU control system 400 needs to have the functions of calculation, storage, and sampling, and is implemented by a calculation module 404, a storage module 406, and a sampling module 402, wherein the temperature measurement module 408 obtains sampling data and transmits the data to the MCU control system 400 for processing, and the temperature measurement module 408 samples the temperature of the bottom of the pot in the heating control module 410. After calculation and logic processing, the MCU control system 400 regulates and controls the heating power and heating time of the heating control module 410.
As shown in fig. 5, the operation control method according to another embodiment of the present invention may be performed in four stages as follows: step S502, stage 1: detecting the temperature rising rate in the middle-fire heating process, and further determining the initial liquid amount according to the temperature rising rate, wherein the stage 1 belongs to the early stage of starting heating, the temperature is not high, and little water vapor is generated, so that the water amount in the stage 1 can be considered to be almost unchanged; step S504, stage 2: continuously detecting the temperature rising rate in the process of heating with strong fire, determining the liquid volume change according to the temperature rising rate, wherein the stage 2 is a stage in which the water temperature rises rapidly and the slope is reduced continuously, when the water temperature rises to a certain temperature, the temperature change is relatively slow, the slope is reduced, the stage 2 starts to generate certain water vapor, but the water volume is small, the water volume change is small, and the water temperature change rate in the stage is recorded; step S506, stage 3: in the process of heating by strong fire, determining the boiling degree of liquid according to liquid amount change and initial liquid amount, wherein when the detected temperature is higher than a preset temperature Ts ℃, entering a stage 3 to start generating a large amount of water vapor, the water temperature in the stage basically does not change obviously, but the liquid amount has certain change, recording the change rate of the temperature in the period, comparing the change rate with the change rate of the water temperature recorded in the stage 2, and when the difference value is larger than or equal to a preset difference value, judging whether to carry out overflow protection or not and selecting proper power reduction power by combining the water amount during initial heating so as to reduce the heating fire to the level of no overflow, thereby realizing the overflow protection function; step S508, stage 4: in the heating process with small firepower, the power is reduced to zero or the temperature is preserved according to the liquid amount change and the initial liquid amount control power.
As shown in fig. 6, the temperature-time profile of the operation control method according to an embodiment of the present invention includes: the temperature sampling in the period from t0 to t4 is carried out in real time, in the period from t0 to t1, the medium-heat power is used for heating, after the temperature enters a stable rising stage, in the period from t1 to t2, a change curve of a proportional change stage is calculated and obtained, and therefore the initial liquid amount of current cooking is deduced.
In the time period from t2 to t3, heating by using large fire, calculating the change rate of the temperature, and calculating and storing a temperature change rate curve when the change rate tends to gradually decrease and is less than a preset temperature change rate and the temperature is less than a preset temperature Ts.
When the temperature is higher than Ts, the temperature is also heated by large fire, the change condition of the temperature change rate per minute in the period from t3 to t4 is compared with the temperature change rate curve recorded in the period from t2 to t3, when the difference value is larger than or equal to a preset difference value, the stage that a large amount of water vapor is generated and the water is boiled violently is determined, and proper power reduction power is selected according to the initial liquid amount.
After time t4, the cooking power is reduced to cook and prevent overflow.
Example five:
fig. 7 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention.
As shown in fig. 7, an operation control method according to another embodiment of the present invention includes: step S702, heating the liquid for a preset time by using medium-heat power; step S704, calculating the temperature rising rate of the temperature to determine the initial liquid amount according to the temperature rising rate; step S706, heating the liquid with large firepower, and continuously detecting the temperature rise rate; step S708, determining whether the temperature-increasing rate is less than or equal to a preset temperature-increasing rate, if so, performing step S710, and if not, performing step S706; step S710, determining whether the temperature is greater than or equal to a predetermined temperature, if so, performing step S714, and if not, performing step S712; step S712, calculating and storing a temperature change rate curve; step S714, continuing to heat the liquid by large fire; step S716, testing the temperature change rate per minute and comparing the temperature change rate with the stored temperature change rate; step S718, calculating the difference between the temperature change rate and a preset temperature change rate; step S720, determining whether the temperature change rate difference is greater than or equal to a preset difference, if so, performing step S722, and if not, performing step S714; step S722, adjusting power according to the initial liquid amount and the capacity of the pot; in step S724, the power is reduced to low power to maintain the heat preservation function or stop heating.
Example six:
according to an embodiment of the present invention, there is also provided a computer-readable storage medium having stored thereon a computer program which, when executed, performs the steps of: before heating the liquid with the specified specific heat capacity to a first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid; when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining the liquid amount change in real time according to the temperature rising rate; the heating power is adjusted according to the initial liquid amount and the liquid amount change.
In the technical scheme, before the liquid with the specified specific heat capacity is heated to the first preset temperature, the liquid does not generate steam or overflow, and the temperature rising rate of the liquid and the liquid amount are approximately linearly related at the moment, so that the initial liquid amount can be accurately determined by detecting the temperature rising rate.
In addition, when the liquid is continuously heated to be close to the second preset temperature, water vapor begins to be generated at the moment, the temperature rising rate is reduced due to the fact that partial heat is taken away by the water vapor, the liquid amount is reduced mainly due to volatilization of the water vapor, and therefore corresponding liquid amount change can be determined in real time according to the temperature rising rate.
Finally, the heating power is adjusted by combining the initial liquid amount and the liquid amount change, whether overflow occurs or not can be determined according to the temperature change and the residual liquid amount, the heating power is correspondingly adjusted, so that the overflow is reduced, an overflow sensor is not required to be arranged, and the overflow condition can be pertinently inhibited.
In any of the above technical solutions, preferably, before heating the liquid with the specified specific heat capacity to the first preset temperature, determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid, specifically including: recording a temperature-time curve of the liquid in real time in the process of heating the liquid to a first preset temperature according to a first preset power; calculating the slope of the temperature-time curve before the temperature is heated to a first preset temperature in real time, and determining the slope as a heating rate; and determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time.
According to the technical scheme, the slope of the temperature-time curve before the temperature is heated to the first preset temperature is calculated in real time, the temperature rise rate is determined, the initial liquid amount is determined according to the slope, the specified specific heat capacity, the heating power and the heating time, the accuracy is high, and the control mode is reliable.
Wherein the thermodynamic formula is based
Further to the solution of the present application, p (t) represents the real-time power value,
representing the integration of the power over the time period t1 to t2, the result of the integration being the total heat heated over the time period t1 to t2, m representing the mass of the liquid, and Δ t representing the temperature change of the liquid over the time period t1 to t2, then if the heating power is constant during the heating phase preceding the first predetermined temperature, i.e. the first predetermined power mentioned above, the mass of the liquid can be accurately determined from the temperature change according to the thermodynamic equation mentioned above.
In any of the above technical solutions, preferably, when the liquid is continuously heated until the temperature rise rate decreases and the temperature of the liquid approaches to the second preset temperature, determining the liquid amount change in real time according to the temperature rise rate, specifically including: when the temperature of the liquid is detected to reach a first preset temperature, the first preset power is increased to a second preset power; when the liquid is continuously heated according to the second preset power, detecting the variation trend of the temperature rising rate according to a preset period; when the change trend of the temperature rise rate is detected to be reduced along with the increase of time, calculating the difference between the temperature of the liquid and a second preset temperature in real time; and in the preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid quantity change in real time according to the temperature rising rate.
In the technical scheme, when the temperature of the liquid is detected to reach the first preset temperature, the first preset power is increased to the second preset power, so that the heating efficiency can be further improved, and at the moment, a large amount of water vapor is generated to reduce the liquid amount, on one hand, since the water vapor takes away a large amount of heat energy, it can be detected that the trend of the temperature rise rate is reduced along with the increase of time, on the other hand, the liquid is violently overturned and even overflows when the water vapor is generated, and the second preset temperature is just close to the temperature at which the liquid overflows, therefore, the temperature difference between the temperature of the detected liquid and the second preset temperature is always less than or equal to the preset temperature difference, the liquid amount change is determined in real time according to the temperature rising rate, and the remaining liquid amount is detected in real time, and the overflow or dry burning of the liquid is reduced by adjusting the power.
In any of the above technical solutions, preferably, the adjusting the heating power according to the initial liquid amount and the liquid amount change specifically includes: calculating the ratio between the change in the amount of liquid and the initial amount of liquid; the heating power is controlled to be reduced according to the ratio.
In the technical scheme, the ratio between the liquid amount change and the initial liquid amount is calculated, the rate of generating water vapor can be determined, the severe boiling degree of the liquid can be indirectly determined, and the overflow condition can be effectively reduced by controlling the reduction of the heating power according to the ratio.
In any of the above technical solutions, preferably, the adjusting the heating power according to the initial liquid amount and the liquid amount change specifically includes: calculating the difference between the initial liquid amount and the accumulated liquid amount change to determine the residual liquid amount; judging whether the residual liquid amount is less than or equal to a preset residual liquid amount or not; when the residual liquid amount is judged to be less than or equal to the preset residual liquid amount, controlling the heating power to be reduced to zero; and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to reduce step by step according to the preset offset.
In this technical scheme, through judging whether the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, liquid is less more fast its intensification promptly, the more probably takes place to spill over, consequently, when judging that the surplus liquid measure is less than or equal to predetermineeing the surplus liquid measure, control heating power reduces to zero, directly stops to liquid heating promptly, and when judging that the surplus liquid measure is greater than predetermineeing the surplus liquid measure, control heating power marching type according to predetermineeing the offset and reduce, through reducing heating power comparatively gently promptly, can reduce the ripple current in the control circuit, simultaneously, also can avoid spilling over the emergence.
The technical scheme of the invention is explained in detail in the above with reference to the accompanying drawings, and the invention provides an operation control method, an operation control device, a cooking utensil and a computer readable storage medium, wherein before the liquid with the specified specific heat capacity is heated to the first preset temperature, the liquid does not generate steam or overflow, and the temperature rise rate of the liquid is approximately linearly related to the liquid amount, so that the initial liquid amount can be determined more accurately by detecting the temperature rise rate. In addition, when the liquid is continuously heated to be close to the second preset temperature, water vapor begins to be generated at the moment, the temperature rising rate is reduced due to the fact that partial heat is taken away by the water vapor, the liquid amount is reduced mainly due to volatilization of the water vapor, and therefore corresponding liquid amount change can be determined in real time according to the temperature rising rate. Finally, the heating power is adjusted by combining the initial liquid amount and the liquid amount change, whether overflow occurs or not can be determined according to the temperature change and the residual liquid amount, the heating power is correspondingly adjusted, so that the overflow is reduced, an overflow sensor is not required to be arranged, and the overflow condition can be pertinently inhibited.
The steps in the method of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The units in the device of the invention can be merged, divided and deleted according to actual needs.
It will be understood by those skilled in the art that all or part of the steps in the methods of the embodiments described above may be implemented by instructions associated with hardware, and the programs may be stored in a computer-readable storage medium, which includes Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc-Read Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. An operation control method characterized by comprising:
determining the initial liquid amount of liquid according to the temperature rising rate of the liquid before heating the liquid with the specified specific heat capacity to a first preset temperature;
when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining liquid volume change in real time according to the temperature rising rate;
and adjusting the heating power according to the initial liquid amount and the liquid amount change.
2. The operation control method according to claim 1, wherein determining an initial liquid amount of the liquid according to a temperature increase rate of the liquid before heating the liquid having a specified specific heat capacity to a first preset temperature specifically comprises:
recording a temperature-time curve of the liquid in real time in the process of heating the liquid to the first preset temperature according to first preset power;
calculating the slope of the temperature-time curve before the temperature is heated to the first preset temperature in real time, and determining the slope as the heating rate;
and determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time.
3. The operation control method according to claim 2, wherein when the liquid is continuously heated until the temperature rise rate decreases and the temperature of the liquid approaches a second preset temperature, determining the liquid amount change in real time according to the temperature rise rate, specifically comprising:
when the temperature of the liquid is detected to reach the first preset temperature, the first preset power is increased to a second preset power;
when the liquid is continuously heated according to the second preset power, detecting the variation trend of the temperature rising rate according to a preset period;
when the change trend of the temperature rising rate is detected to be reduced along with the increase of time, calculating the difference between the temperature of the liquid and the second preset temperature in real time;
and within a preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid amount change in real time according to the heating rate.
4. The operation control method according to any one of claims 1 to 3, wherein the adjustment of the heating power based on the initial liquid amount and the liquid amount change specifically includes:
calculating a ratio between the change in the amount of liquid and the initial amount of liquid;
controlling the heating power to decrease according to the ratio.
5. The operation control method according to any one of claims 1 to 3, wherein the adjustment of the heating power based on the initial liquid amount and the liquid amount change specifically includes:
calculating a difference between the initial liquid amount and the accumulated liquid amount change to determine a remaining liquid amount;
judging whether the residual liquid amount is less than or equal to a preset residual liquid amount or not;
controlling the heating power to be reduced to zero when the residual liquid amount is judged to be less than or equal to the preset residual liquid amount;
and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to be reduced step by step according to a preset offset.
6. An operation control device characterized by comprising:
the determining unit is used for determining the initial liquid amount of the liquid according to the temperature rising rate of the liquid before the liquid with the specified specific heat capacity is heated to a first preset temperature;
the determination unit is further configured to: when the liquid is continuously heated until the temperature rising rate is reduced and the temperature of the liquid is close to a second preset temperature, determining liquid volume change in real time according to the temperature rising rate;
the operation control device further includes:
and the power regulating unit is used for regulating the heating power according to the initial liquid amount and the liquid amount change.
7. The operation control device according to claim 6, wherein the determination unit specifically includes:
the recording subunit is used for recording a temperature-time curve of the liquid in real time in the process of heating the liquid to the first preset temperature according to first preset power;
the calculating subunit is used for calculating the slope of the temperature-time curve before the temperature is heated to the first preset temperature in real time and determining the slope as the heating rate;
and the quantifying subunit is used for determining the initial liquid amount according to the slope, the specified specific heat capacity, the heating power and the heating time length.
8. The operation control device according to claim 7, wherein the determination unit further includes:
the increasing subunit is used for increasing the first preset power to a second preset power when the temperature of the liquid is detected to reach the first preset temperature;
the detection subunit is used for detecting the variation trend of the temperature rising rate according to a preset period when the liquid is continuously heated according to the second preset power;
the difference subunit is used for calculating the difference between the temperature of the liquid and the second preset temperature in real time when the change trend of the temperature rising rate is detected to be reduced along with the increase of time;
the detection subunit is further configured to: and within a preset time range, if the temperature difference between the detected liquid temperature and the second preset temperature is always smaller than or equal to the preset temperature difference, determining the liquid amount change in real time according to the heating rate.
9. The operation control device according to any one of claims 6 to 8, wherein the power adjusting unit specifically includes:
a proportional subunit for calculating a ratio between the change in the liquid amount and the initial liquid amount;
and the reducing subunit is used for controlling the heating power to be reduced according to the ratio.
10. The operation control device according to any one of claims 6 to 8, wherein the power adjusting unit specifically further includes:
a remaining subunit configured to calculate a difference between the initial liquid amount and the accumulated liquid amount change, and determine the difference as a remaining liquid amount;
a judging subunit, configured to judge whether the remaining liquid amount is less than or equal to a preset remaining liquid amount;
a control subunit, configured to control the heating power to decrease to zero when it is determined that the remaining liquid amount is less than or equal to the preset remaining liquid amount;
the control subunit is further configured to: and when the residual liquid amount is judged to be larger than the preset residual liquid amount, controlling the heating power to be reduced step by step according to a preset offset.
11. A cooking appliance, comprising:
a memory, a processor and an operation control program stored on the memory and executable on the processor, the operation control program, when executed by the processor, implementing the steps of the operation control method according to any one of claims 1 to 5;
and/or comprising an operation control device according to any one of claims 6 to 10.
12. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the operation control method according to any one of claims 1 to 5.
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