CN113558491A - Temperature control method and device for air fryer, storage medium and air fryer - Google Patents
Temperature control method and device for air fryer, storage medium and air fryer Download PDFInfo
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- CN113558491A CN113558491A CN202110870324.0A CN202110870324A CN113558491A CN 113558491 A CN113558491 A CN 113558491A CN 202110870324 A CN202110870324 A CN 202110870324A CN 113558491 A CN113558491 A CN 113558491A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
Abstract
The application provides a temperature control method and device for an air fryer, a storage medium and the air fryer. A method of controlling temperature of an air fryer comprising a cooking chamber and a heating element, said method comprising: acquiring the temperature of the cooking cavity in real time; controlling the heating element to work in an active temperature control mode; the active temperature control mode comprises the following steps: judging the size relationship among the temperature, the lower temperature limit and the upper temperature limit; when the lower temperature limit is less than the upper temperature limit, judging the temperature change condition of the cooking cavity; and automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity. According to the temperature control method provided by the embodiment, the lower temperature limit and the upper temperature limit are taken as the basis, the cooking cavity is heated or stopped to be heated, so that the temperature of the cooking cavity is quickly controlled to be close to the target temperature, and the temperature change amplitude in the control process is effectively reduced by adjusting the on-off time ratio of the heating element in the next cycle.
Description
Technical Field
The application relates to the technical field of kitchen appliances, in particular to a temperature control method and device for an air fryer, a storage medium and the air fryer.
Background
The air fryer is a kitchen appliance which is popular among people at present, and can fry various foods such as chicken wings, chips, steak, steamed bread and the like. Different temperatures and times need to be selected for different food materials, but the total temperature control mode is as follows: when the temperature sensor detects that the temperature in the cooking cavity reaches the target temperature, the heating tube is controlled to stop heating; and when the temperature sensor detects that the temperature in the cooking cavity is lower than the target temperature, controlling the heating tube to start heating. However, the temperature control method has the following defects: temperature sensor temperature sensing has the delay, leads to the start-up of heating tube and shuts down also to have the hysteresis quality, and then leads to the temperature in the culinary art intracavity to be higher than the target temperature or be less than the target temperature, can't realize accurate accuse temperature, is unfavorable for very much culinary art quality and culinary art efficiency.
Disclosure of Invention
The application provides a temperature control method and device for an air fryer, a storage medium and the air fryer, which are used for solving the problems that the temperature sensing of the existing temperature sensor is delayed, so that the starting and the shutdown of a heating pipe have hysteresis, and further the accurate temperature control cannot be realized.
In order to solve the above technical problem, in a first aspect, the present application discloses a temperature control method for an air fryer, the air fryer includes a cooking cavity and a heating element, the heating element circularly heats the cooking cavity in a startup and shutdown manner, the method includes:
acquiring the temperature T of the cooking cavity in real time;
controlling the heating element to work in an active temperature control mode so as to reduce the temperature amplitude of the cooking cavity;
the active temperature control mode comprises the following steps:
judging the temperature T and the lower temperature limit TminUpper temperature limit TmaxThe magnitude relationship between them; t ismin＝T0-t1，Tmax＝T0+t2(ii) a In the formula, T0Is the target temperature, t1Is the float value at the target temperature, t2Is a target temperature float value;
at a lower temperature limit Tmin< the temperature T < the upper temperature limit TmaxJudging the temperature change condition of the cooking cavity;
automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity; the on-off time ratio is the ratio of the on-time to the off-time of the heating element when a cycle is completed.
In a possible embodiment, the automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change of the cooking cavity comprises:
acquiring the average temperature of the previous cycle and the average temperature of the current cycle;
when the average temperature of the current cycle is higher than that of the previous cycle, reducing the on-off time ratio of the heating element in the next cycle;
when the average temperature of the current cycle is lower than that of the previous cycle, increasing the on-off time ratio of the heating element in the next cycle;
when the average temperature of the current cycle is equal to the average temperature of the previous cycle, the on-off time ratio of the heating element at the next cycle is kept unchanged.
In another possible embodiment, the automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change of the cooking cavity comprises:
acquiring the average temperature of the current cycle;
the average temperature in the current cycle is greater than a target temperature T0When the current time is less than the preset time, reducing the on-off time ratio of the heating element in the next cycle;
the average temperature at the current cycle is less than a target temperature T0Increasing the on-off time ratio of the heating element in the next cycle;
the average temperature at the current cycle is equal to the target temperature T0The on-off time ratio of the heating element at the next cycle is kept constant.
In an optional embodiment, the active temperature control method further includes:
at said temperature T > said upper temperature limit TmaxWhen the heating element is turned off, the heating element is stoppedHeating the cooking chamber;
at said temperature T < said lower temperature limit TminWhen the cooking chamber is opened, the heating element is turned on and heats the cooking chamber.
In an alternative embodiment, the method further comprises:
controlling the heating element to work in a passive temperature control mode, and executing the active temperature control mode after executing preset cycle times in the passive temperature control mode;
wherein, the passive temperature control mode comprises:
judging the temperature T and the target temperature T0The magnitude relationship of (1);
at the temperature T equal to the target temperature T0While, turning off the heating element;
at the temperature T being less than the target temperature T0When so, the heating element is turned on.
In an alternative embodiment, the heating element has an initial on-off time ratio; the initial on-off time ratio is the ratio of the on-time to the off-time of the heating element when the passive temperature control mode is executed for the last time.
In a second aspect, the application discloses temperature regulating device of an air fryer, the air fryer includes a cooking cavity and a heating element, the heating element cyclically heats with the mode of starting up, shutting down the cooking cavity, the device includes:
the acquisition module is used for acquiring the temperature T of the cooking cavity in real time;
the first control module is used for controlling the heating element to work in an active temperature control mode so as to reduce the temperature amplitude of the air fryer;
wherein the first control module comprises:
a first judgment submodule for judging the real-time temperature T and the lower temperature limit TminUpper temperature limit TmaxThe magnitude relationship between them; wherein, Tmin＝T0-t1，Tmax＝T0+t2(ii) a In the formula, T0To the eyesTarget temperature, t1Is the float value at the target temperature, t2Is a target temperature float value;
a second judgment submodule for limiting the temperature lower limit Tmin< the temperature T < the upper temperature limit TmaxJudging the temperature change condition of the cooking cavity;
the first control submodule is used for automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity; the start-stop time ratio is the ratio of the start-up time to the stop time of the heating element when one-time cyclic heating is completed.
In a possible embodiment, the first control sub-module comprises:
a first acquisition submodule: the temperature control device is used for acquiring the average temperature of the previous cycle and the average temperature of the current cycle;
a first adjustment submodule for decreasing the on-off time ratio of the heating element in the next cycle when the average temperature of the current cycle is greater than the average temperature of the previous cycle; when the average temperature of the current cycle is lower than that of the previous cycle, increasing the on-off time ratio of the heating element in the next cycle; when the average temperature of the current cycle is equal to the average temperature of the previous cycle, the on-off time ratio of the heating element at the next cycle is kept unchanged.
In another possible embodiment, the first control sub-module includes:
the second acquisition submodule is used for acquiring the average temperature of the current cycle;
a second regulator submodule for regulating the average temperature of the current cycle to be higher than a target temperature T0When the current time is less than the preset time, reducing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is less than a target temperature T0Increasing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is equal to the target temperature T0The on-off time ratio of the heating element at the next cycle is kept constant.
In an optional embodiment, the apparatus further comprises:
the second control module is used for controlling the heating element to work in a passive temperature control mode, and executing the dynamic temperature control mode after the passive temperature control mode executes preset cycle times;
wherein the second control module comprises:
a third judgment submodule for judging the temperature T and the target temperature T0The magnitude relationship of (1);
a second control submodule for controlling the temperature T to be equal to the target temperature T0While, turning off the heating element; at the temperature T being less than the target temperature T0When so, the heating element is turned on.
In a third aspect, the present application discloses a computer readable storage medium having stored thereon an executable computer program which when run implements the method for controlling temperature of an air fryer according to any one of the first aspect.
In a fourth aspect, the present application discloses an air fryer that implements the method for controlling temperature of an air fryer of any one of the first aspect, or the air fryer comprises the apparatus for controlling temperature of an air fryer of any one of the second aspect, or the air fryer comprises the computer readable storage medium of the third aspect.
Compared with the prior art, the method has the following advantages:
compared with the existing temperature control method which simply controls the heating or stopping of the heating of the cooking cavity according to a fixed target temperature, the temperature control method of the air fryer provided by the embodiment uses the lower temperature limit TminAnd an upper temperature limit TmaxAccording to the method, the cooking cavity is controlled to be heated or stopped to be heated in an active temperature control mode, so that the temperature of the cooking cavity is controlled to be close to the target temperature quickly, and the temperature change range in the control process is effectively reduced by adjusting the on-off time ratio of the heating element in the next cycle.
Drawings
FIG. 1 is a diagram of a method for controlling temperature of a conventional air fryer;
FIG. 2 is a block diagram of the construction of an air fryer;
FIG. 3 is a flow chart of a method for controlling temperature of an air fryer in accordance with an embodiment of the present invention;
FIG. 4 is a logic diagram of a method for controlling temperature of an air fryer in accordance with one embodiment of the present invention;
FIG. 5 is a logic diagram of a method for controlling temperature of an air fryer in accordance with another embodiment of the present invention;
FIG. 6 is a block diagram of the temperature control device of the air fryer in accordance with the embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The air fryer is a kitchen appliance which is popular among people at present, and can fry various foods such as chicken wings, chips, steak, steamed bread and the like. The existing air fryer mainly comprises a heater, a fan, a controller, a temperature sensor, a display screen (button) and the like, and the working principle is as follows: a user sets a working mode through a display screen (button), air generates flowing air in the air fryer through a fan, the temperature of the flowing air is rapidly increased after the flowing air passes through a heater area, meanwhile, a temperature sensor in the machine sends temperature data to a controller in real time, and after the controller receives an instruction of the display screen (button), the controller controls the heater to be started and stopped, so that the temperature of the flowing air is constant within a certain range, and then the heated flowing air heats food to finish cooking. It can be seen that the heating temperature has a great influence on the cooking quality and efficiency, and it is very necessary to achieve precise control of the heating temperature.
In the related art, a passive temperature control manner is usually adopted to control the heating element to work. Referring to fig. 1, when the temperature sensor detects that the temperature in the cooking cavity reaches a target temperature, the heating tube is controlled to stop heating; and when the temperature sensor detects that the temperature in the cooking cavity is lower than the target temperature, controlling the heating tube to start heating. However, the temperature control method has the following defects: temperature sensor temperature sensing has the delay, leads to the start-up of heating tube and shuts down also to have the hysteresis quality, and then leads to the temperature in the culinary art intracavity to be higher than the target temperature or be less than the target temperature, can't realize accurate accuse temperature, is unfavorable for very much culinary art quality and culinary art efficiency.
Therefore, accurate temperature control is achieved by adopting an active temperature control mode in the application. The concrete expression is as follows: two temperature limits, i.e. an upper temperature limit T, are set around the target temperaturemaxAnd a lower temperature limit TminWhen the temperature sensor detects that the temperature of the cooking cavity is at the upper temperature limit TmaxAnd a lower temperature limit TminIn the middle, the on-off time ratio of the heating element in the next cycle is adjusted according to the temperature change condition in the cooking cavity; when the temperature sensor detects that the temperature of the cooking cavity is greater than the upper temperature limit TmaxWhen the cooking device is used, the heating element is directly closed, so that the temperature in the cooking cavity is prevented from being overhigh; when the temperature sensor detects that the temperature of the cooking cavity is less than the lower temperature limit TminWhen the cooking chamber is opened, the heating element is turned on to heat the cooking chamber.
Referring to fig. 2, the air fryer of the embodiment includes a cooking cavity, a fan, a control device, a temperature measuring device and a heating element, wherein the heating element is used for heating air in the cooking cavity, the fan is used for circulating hot air in the cooking cavity and heating food materials of the air fryer, and the temperature measuring device is used for detecting temperature in the cooking cavity and sending a detection value to the control device; and the control device is used for controlling the heating element and the fan to work according to the acquired detection value. Specifically, the temperature measuring device is a temperature sensor which measures temperature through an NTC detection circuit, for example, an MF58 type NTC thermistor is adopted to detect the temperature in the cooking cavity, and the temperature coefficient B25/50 of the thermistor is 3950K +/-1%; the heating element is a heating tube.
Referring to fig. 3, in a first aspect, embodiments of the present application illustrate a method for controlling temperature of an air fryer, the air fryer including a cooking chamber and a heating element that cyclically heats the cooking chamber in a power-on and power-off manner, the method including:
s1, acquiring the temperature T of the cooking cavity in real time;
in this embodiment, when the air fryer is operated, the temperature in the cooking cavity is changed under the influence of food and the surrounding environment in the cooking cavity, so that the temperature T of the cooking cavity needs to be measured in real time by using the temperature sensor, and the detected value is transmitted to the control device; the control device acquires the temperature T of the cooking cavity and adopts a corresponding control strategy to control the heating tube to work.
And S2, controlling the heating element to work in an active temperature control mode so as to reduce the temperature amplitude of the cooking cavity. The active temperature control mode comprises the following steps: judging the temperature T and the lower temperature limit TminUpper temperature limit TmaxThe magnitude relationship between them; t ismin＝T0-t1，Tmax＝T0+t2(ii) a In the formula, T0Is the target temperature, t1Is the float value at the target temperature, t2Is a target temperature float value; at a lower temperature limit Tmin< the temperature T < the upper temperature limit TmaxJudging the temperature change condition of the cooking cavity; automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity; the on-off time ratio is the ratio of the on-time to the off-time of the heating element when a cycle is completed.
In the present embodiment, the target temperature T0The setting value can be set by a user through a button (display screen) of the air fryer, or can be set according to different foods before the equipment leaves a factory; lower limit of temperature TminIs a target temperature T0Floating downward at a certain temperature t1The temperature corresponding to the time; upper limit of temperature TmaxIs a target temperature T0Floating to a certain temperature t2The temperature corresponding to the time. t is t1And t2The sizes of the devices can be the same or different, but the sizes of the devices are usually set before the devices leave a factory, and the devices cannot be changed by a user at will. By way of example, the target temperature T is set during the cooking of chicken wings0Set at 180 ℃ t1Is 3, t2A lower limit T of 5 at this timeminAt 177 ℃ and an upper temperature limit TmaxThe temperature was 185 ℃. By judging the temperature T and the lower temperature limit T of the cooking cavityminUpper temperature limit TmaxThe size relationship between the heating pipes controls the working mode of the heating pipes; when the temperature T is less than the lower limit TminWhen the temperature is high, the heating tube is opened; when the lower limit of temperature Tmin< temperature T < upper temperature limit TmaxWhen the heating tube is in intermittent operation; when the temperature T is greater than the upper temperature limit TmaxWhen the temperature is high, the heating tube is closed.
In particular, when the temperature T of the cooking chamber is at a lower temperature limit TminAnd an upper temperature limit TmaxIn the meantime, namely, the temperature of the cooking cavity is at the target temperature T0The heating tube alternately heats the air in the cooking cavity at the moment, and the variation range of the temperature in the cooking cavity can be reduced by controlling the on-off time of the heating tube in the next cycle; the on-off time ratio of the heating tube is related to the temperature change condition in the cooking cavity, so that the on-off time ratio of the heating tube in the next cycle can be adjusted according to the temperature change condition in the cooking cavity, and the change amplitude of the temperature in the cooking cavity is further reduced.
It should be noted that the temperature amplitude of the cooking cavity refers to the amplitude of the temperature change in the cooking cavity, and is generally equal to the difference between the maximum temperature and the minimum temperature in the cooking cavity (the difference after the heat generating tube is stably operated).
The heating tubes have different on-off time ratios, namely the ratio of the on-time to the off-time, so that the heat (temperature) provided to the cooking cavity is different. Specifically, the larger the on-off time ratio of the heating tube is, for example, the shorter the on-off time is, the more heat is provided, and the faster the temperature change speed in the cooking cavity is; conversely, the smaller the on-off time ratio of the heating tube, the smaller the amount of heat provided, and the slower the temperature change in the cooking chamber. Therefore, by adjusting the on-off time ratio of the heating tube of the next cycle, the temperature in the cooking cavity is prevented from being increased too high or decreased too low, so that the temperature in the cooking cavity is at the target temperature T0And small-amplitude up-and-down floating is performed nearby, so that the amplitude of temperature change in the cooking cavity is reduced, and accurate temperature control is realized.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
compared with the existing passive temperature control mode which simply controls the heating or stopping of the heating of the cooking cavity according to one fixed target temperature, the temperature control method of the air fryer provided by the embodiment can control the temperature of the lower limit TminAnd an upper temperature limit TmaxAccording to the method, the cooking cavity is controlled to be heated or stopped to be heated in an active temperature control mode, so that the temperature of the cooking cavity is controlled to be close to the target temperature quickly, and the temperature change amplitude in the control process is effectively reduced by adjusting the on-off time ratio of the heating element in the next cycle.
In order to further explain the beneficial effects of the implementation, the air fryer is controlled by adopting a passive temperature control mode and the low-temperature amplitude control method of the embodiment, and the cycle time and the temperature amplitude change value in the working process are tested. The result shows that when the traditional temperature control mode is adopted, the time of one cycle is 2min (such as starting up for 1min and stopping for 1min), and the temperature amplitude is large (such as 20 ℃); when the low-temperature amplitude control method of the embodiment is adopted, the time for one cycle is 40s (such as 20s for starting up and 20s for stopping), and the temperature amplitude is small (such as 5 ℃). Therefore, the temperature amplitude change of the low-temperature amplitude control method is small, and accurate temperature control can be achieved in the cooking process.
In a possible embodiment, in step S2, the automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature variation of the cooking cavity includes:
acquiring the average temperature of the previous cycle and the average temperature of the current cycle;
when the average temperature of the current cycle is higher than that of the previous cycle, reducing the on-off time ratio of the heating element in the next cycle;
when the average temperature of the current cycle is lower than that of the previous cycle, increasing the on-off time ratio of the heating element in the next cycle;
when the average temperature of the current cycle is equal to the average temperature of the previous cycle, the on-off time ratio of the heating element at the next cycle is kept unchanged.
In this embodiment, the temperature sensor detects the temperature of the cooking cavity in real time, for example, a temperature detection value is collected once per second, and the control device calculates an average temperature according to the detection value collected when the heating element (cooking cavity) completes one cycle and the used time; judging the change condition of the temperature in the cooking cavity according to the average temperature of the current cycle and the previous cycle; and regulating and controlling the on-off time ratio of the heating element in the next cycle according to the change condition of the temperature in the cooking cavity.
Specifically, when the average temperature of the current cycle is greater than the average temperature of the previous cycle, it indicates that the temperature in the cooking cavity is in the rising stage, and in order to avoid the temperature being too high, when the next cycle is performed, the on-time of the heating tube needs to be shortened, that is, under the condition that the whole cycle time is not changed, the variation range of the temperature in the cooking cavity is reduced by reducing the on-off time ratio, for example, when the next cycle is performed, the operation modes of 20s for on-time and 20s for off-time are adjusted to 19s for on-time and 21s for off-time, and at this time, the temperature in the cooking cavity does not exceed the upper temperature limit T at this timemax. When the average temperature of the current cycle is lower than that of the previous cycle, the temperature in the cooking cavity is in a descending stage, in order to avoid the influence of the too low temperature on the cooking efficiency and the cooking quality, when the next cycle is carried out, the starting time of the heating tube needs to be increased, namely, the temperature in the cooking cavity is quickly increased in a mode of increasing the on-off time ratio, and meanwhile, the temperature is prevented from being reduced to be too low; if the next cycle is carried out, the working modes of starting 20s and stopping 20s are adjusted to heating 21s and stopping 19s, and the temperature in the cooking cavity is not lower than the lower temperature limit Tmin. When the average temperature of the current cycle is equal to the average temperature of the previous cycle, the temperature in the cooking cavity is maintained in a balanced state, and the on-off time of the heating tube is not required to be adjusted when the next cycle is carried out, and if the next cycle is carried out, the operation mode of starting the machine for 20s and stopping the machine for 20s is still used for working. The operation of the heating element is controlled by the reciprocating circulation.
In the embodiment, the change condition of the temperature in the cooking cavity is judged according to the average temperature of the current cycle and the previous cycle; when the temperature of the cooking cavity rises, the starting and stopping time of the next cycle is reducedAn intermediate ratio; when the temperature of the cooking chamber decreases, the next cycle on-off time ratio is increased. By adopting the temperature control mode, the temperature in the cooking cavity is enabled to be at the target temperature T0Small-amplitude up-and-down floating is performed nearby, so that the amplitude of temperature change in the cooking cavity is reduced. Compared with the traditional passive temperature control mode, the temperature control mode of the embodiment avoids the error caused by using the measured value of the temperature sensor to adjust the on-off time ratio of the heating element (the result of the temperature sensor usually has hysteresis) and has good temperature control precision.
In another possible embodiment, in step S2, the automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature variation of the cooking cavity includes:
acquiring the average temperature of the current cycle;
the average temperature in the current cycle is greater than a target temperature T0When the current time is less than the preset time, reducing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is less than a target temperature T0Increasing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is equal to the target temperature T0The on-off time ratio of the heating element at the next cycle is kept constant.
In this embodiment, the temperature sensor detects the temperature of the cooking cavity in real time, for example, a temperature detection value is collected once per second, and the control device calculates an average temperature according to the detection value collected when the heating element (cooking cavity) completes one cycle and the used time; and comparing the average temperature of the current cycle with the target temperature, judging the change condition of the temperature in the cooking cavity, and regulating and controlling the on-off time ratio of the heating element in the next cycle according to the change condition of the temperature in the cooking cavity.
Specifically, when the average temperature of the current cycle is greater than the target temperature, which indicates that the temperature in the cooking cavity exceeds the target temperature, in order to avoid the temperature from being too high, the start-up time of the heating tube needs to be shortened when the next cycle is performed, that is, the variation range of the temperature in the cooking cavity is reduced by reducing the on-off time ratio; if the next cycle is performed, the system is stopped from the start-up for 20sThe working mode of 20s is adjusted to be power-on 19s and power-off 21s, and the temperature in the cooking cavity does not exceed the upper temperature limit Tmax. When the average temperature of the current cycle is less than the target temperature, it indicates that the temperature in the cooking cavity does not reach the target temperature, and at this time, in order to quickly reach the target temperature, when the next cycle is performed, the on-time of the heating tube needs to be increased, that is, the temperature in the cooking cavity quickly reaches the target temperature by increasing the on-off time ratio, and for example, when the next cycle is performed, the operation modes of on-time 20s and off-time 20s are adjusted to heating 21s and off-time 19 s. When the average temperature of the current cycle is equal to the target temperature, the temperature in the cooking cavity is maintained in a balanced state, and the on-off time of the heating tube is not required to be adjusted when the next cycle is carried out; if the next cycle is performed, the operation mode is still performed in the power-on 20s and power-off 20 s. The operation of the heating element is controlled by the reciprocating circulation.
In an optional embodiment, the active temperature control method further includes:
at said temperature T > said upper temperature limit TmaxWhen the cooking chamber is in the closed state, the heating element is turned off and stops heating the cooking chamber; at said temperature T < said lower temperature limit TminWhen the cooking chamber is opened, the heating element is turned on and heats the cooking chamber.
In this embodiment, if the temperature T of the cooked cavity is greater than the upper temperature limit TmaxIn the meantime, the cooking cavity can be naturally cooled, i.e. the heating element is turned off until the real-time temperature of the cooking cavity drops to the lower temperature limit TminAnd an upper temperature limit TmaxIn the meantime, the on-off time ratio of the heating element in the next cycle is adjusted; if the temperature T of the cooked cavity is less than the lower temperature limit TminWhen the cooking chamber is started to be heated, the heating element is started until the real-time temperature of the cooking chamber rises to the lower temperature limit TminAnd an upper temperature limit TmaxAnd then adjusting the on-off time ratio of the heating element in the next cycle.
In an alternative embodiment, the method for controlling the temperature of the air fryer further comprises:
controlling the heating element to work in a passive temperature control mode, and executing the active temperature control mode after executing preset cycle times in the passive temperature control mode; wherein, the passive temperature control mode comprises:
judging the temperature T and the target temperature T0The magnitude relationship of (1); at the temperature T equal to the target temperature T0While, turning off the heating element; at the temperature T being less than the target temperature T0When so, the heating element is turned on.
In the present embodiment, the temperature T of the cooking cavity is first obtained; and then, after the circulation times are circularly preset in a passive temperature control mode, the circulation work is carried out in an active temperature control mode. Illustratively, the preset number of cycles is two, and after the two passive temperature control modes are executed, the active temperature control mode is executed.
Specifically, before the air fryer does not work, the heating pipe is in a closed state; when the electric cooker works, the fan and the heating pipe of the air fryer are started to heat the cooking cavity. When the temperature in the cooking cavity reaches the target temperature T0And closing the heating tube, and recording the first circulation after the heating tube undergoes one circulation. Because the food in the cooking cavity can absorb partial heat and the air fryer can also lose heat, after a period of working time, the temperature in the cooking cavity can be lower than the target temperature T0At this time, the heating tube needs to be turned on again; when the temperature in the cooking cavity reaches the target temperature T0When the heating tube is closed, the heating tube goes through a cycle again, which is recorded as a second cycle. In the second circulation process, the heating tube is already in a stable state, so that the air fryer can be controlled to work in an active temperature control mode after the second circulation, namely, the third circulation and the subsequent circulation are started.
In an alternative embodiment, the heating element has an initial on-off time ratio; the initial on-off time ratio is the ratio of the on-time to the off-time of the heating element when the passive temperature control mode is executed for the last time.
In this embodiment, in the second cycle, the time from the start to the shutdown of the heat pipe is recorded as the initial start-up time, and the time from the shutdown to the restart of the heat pipe is recorded as the initial shutdown time. The initial start-stop time ratio is the ratio of the initial start-up time to the initial stop time, and the start-stop time ratio during active temperature control is adjusted according to the initial start-stop time ratio.
FIG. 4 is a logic diagram illustrating a method for controlling temperature of an air fryer in accordance with one embodiment of the present invention. Referring to fig. 4, the temperature control method of the air fryer specifically executes the following process:
step S11, starting a power key, and starting the air fryer to work;
step S12, opening the fan and the heating tube to heat the cooking cavity;
step S13, acquiring the temperature T of the cooking cavity in real time;
step S14, judging whether the temperature T in the cooking cavity is equal to the target temperature T0(ii) a If yes, go to step S14; if not, go to step S16;
step S15, closing the heating tube;
step S16, opening the heating tube;
step S17, after the step S14 is circulated twice, whether the temperature T in the cooking cavity is larger than the lower temperature limit T or not is judgedminLess than the upper temperature limit Tmax(ii) a If yes, go to step S18; if not, go to step S23;
step S18, judging whether the average temperature of the current cycle is smaller than the average temperature of the previous cycle; if yes, go to step S19; if not, go to step S20;
step S19, increasing the start-stop ratio of the heating tube in the next cycle;
step S20, judging whether the average temperature of the current cycle is larger than the average temperature of the previous cycle; if yes, go to step S21; if not, go to step S22;
step S21, reducing the start-stop ratio of the heating tube in the next cycle;
step S22, keeping the start-stop ratio of the heating tube unchanged in the next cycle;
step S23, judging whether the temperature T in the cooking cavity is less than the lower temperature limit TminIf yes, go to step S24; if not, executingStep S25;
step S24, opening the heating tube;
step S25, judging whether the temperature T in the cooking cavity is larger than the upper temperature limit T or notmax(ii) a If yes, go to step S26;
and step S26, closing the heating tube.
Illustratively, when the target temperature is 180 ℃, the upper temperature limit is the upper temperature limit TmaxAt 185 ℃ and a lower temperature limit TminAt 177 ℃, the working process of the air fryer is as follows: when temperature sensor detected the temperature of culinary art chamber and is 25 ℃, open the heating tube, heat the culinary art chamber, when the temperature rose to 180 ℃, closed the heating tube, the heating tube has carried out a cycle work this moment. When the temperature sensor detects that the temperature of the cooking cavity is 176 ℃, the heating tube is opened to heat the cooking cavity, when the temperature rises to 180 ℃, the heating tube is closed, and the heating tube performs once circulation work again. When the temperature sensor detects that the temperature of the cooking cavity is between 177 ℃ and 185 ℃, the heating tube alternately heats the cooking cavity in a mode that the shutdown time is 20s and the startup time is 20 s. The temperature sensor records the temperature in the cooking cavity in real time and calculates the average temperature during each cycle. If the average temperature of the last cycle is 178 ℃; the average temperature of the current cycle is 179 ℃, and the startup time and the shutdown time of the heating tube are 20s and 20s respectively; then, when the next cycle is performed, the on-time and off-time of the heat generating tube are adjusted to 19s and 21 s. Because the temperature in the cooking cavity is in dynamic change during the working process of the air fryer, the temperature of the cooking cavity and the upper limit T of the temperature need to be judged in real timemaxWith a lower temperature limit TminThe average temperature of the previous cycle and the average temperature of the next cycle, and the logic strategy of the steps S14-S26 is adopted to control the circulation work of the heating tube.
In this embodiment, the average temperature of the previous cycle is compared with the average temperature of the current cycle, the change condition of the temperature in the cooking cavity is determined, and the on-off time ratio of the heating tube is adjusted according to the change condition of the temperature in the cooking cavity, so as to reduce the change amplitude of the temperature.
FIG. 5 is a logic diagram illustrating a method for controlling temperature of an air fryer in accordance with another embodiment of the present invention. Referring to fig. 5, the difference between the logic diagram of the temperature control method of the air fryer of the present embodiment and the logic diagram of the temperature control method of the air fryer of fig. 4 lies in steps S18 and S20. Specifically, in the present embodiment, step S18 is to determine whether the average temperature of the current cycle is greater than the target temperature; if yes, go to step S19; if not, go to step S20; step S20, judging whether the average temperature of the current cycle is less than the target temperature; if yes, go to step S21; if not, go to step S22. The rest steps are the same as those in fig. 4, and are not described herein.
In this embodiment, the average temperature of the current cycle is compared with the target temperature, the change condition of the temperature in the cooking cavity is judged, and the on-off time ratio of the heating tube is adjusted according to the change condition of the temperature in the cooking cavity, so as to reduce the change amplitude of the temperature.
In a second aspect, referring to fig. 6, the present application discloses a temperature control device for an air fryer comprising a cooking chamber and a heating element that cyclically heats the cooking chamber on and off, the device comprising:
the acquisition module 1 is used for acquiring the temperature T of the cooking cavity in real time;
the first control module 2 is used for controlling the heating element to work in an active temperature control mode so as to reduce the temperature amplitude of the air fryer;
wherein the first control module 2 comprises:
a first determining submodule 201 for determining the real-time temperature T and the lower temperature limit TminUpper temperature limit TmaxThe magnitude relationship between them; wherein, Tmin＝T0-t1，Tmax＝T0+t2(ii) a In the formula, T0Is the target temperature, t1Is the float value at the target temperature, t2Is a target temperature float value;
a second determination submodule 202 for determining a lower limit T of the temperaturemin< the temperature T < the upper temperature limit TmaxThen, judge the cooking cavityTemperature change condition of (2);
the first control submodule 203 is used for automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity; the start-stop time ratio is the ratio of the start-up time to the stop time of the heating element when one-time cyclic heating is completed.
In a possible embodiment, the first control sub-module 203 comprises:
a first acquisition submodule: the temperature control device is used for acquiring the average temperature of the previous cycle and the average temperature of the current cycle;
a first adjustment submodule for decreasing the on-off time ratio of the heating element in the next cycle when the average temperature of the current cycle is greater than the average temperature of the previous cycle; when the average temperature of the current cycle is lower than that of the previous cycle, increasing the on-off time ratio of the heating element in the next cycle; when the average temperature of the current cycle is equal to the average temperature of the previous cycle, the on-off time ratio of the heating element at the next cycle is kept unchanged.
In another possible embodiment, the first control sub-module 203 includes:
the second acquisition submodule is used for acquiring the average temperature of the current cycle;
a second regulator submodule for regulating the average temperature of the current cycle to be higher than a target temperature T0When the current time is less than the preset time, reducing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is less than a target temperature T0Increasing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is equal to the target temperature T0The on-off time ratio of the heating element at the next cycle is kept constant.
In an optional embodiment, the apparatus further comprises:
the second control module is used for controlling the heating element to work in a passive temperature control mode, and executing the dynamic temperature control mode after the passive temperature control mode executes preset cycle times;
wherein the second control module comprises:
a third judgment submodule for judging the temperature T and the target temperature T0The magnitude relationship of (1);
a second control submodule for controlling the temperature T to be equal to the target temperature T0While, turning off the heating element; at the temperature T being less than the target temperature T0When so, the heating element is turned on.
In a third aspect, the present application discloses a computer readable storage medium having stored thereon an executable computer program which when run implements the method for controlling temperature of an air fryer according to any one of the first aspect.
In a fourth aspect, the present application discloses an air fryer that implements the method for controlling temperature of an air fryer of any one of the first aspect, or the air fryer comprises the apparatus for controlling temperature of an air fryer of any one of the second aspect, or the air fryer comprises the computer readable storage medium of the third aspect.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment. The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program 2 product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is provided for the temperature control method, device, storage medium and air fryer of the air fryer, and the specific examples are applied in this document to explain the principle and implementation of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (12)
1. A method of controlling temperature in an air fryer comprising a cooking chamber and a heating element, wherein the heating element cyclically heats the cooking chamber on and off, the method comprising:
acquiring the temperature T of the cooking cavity in real time;
controlling the heating element to work in an active temperature control mode so as to reduce the temperature amplitude of the cooking cavity;
the active temperature control mode comprises the following steps:
judging the temperature T and the lower temperature limit TminUpper temperature limit TmaxThe magnitude relationship between them; t ismin＝T0-t1，Tmax＝T0+t2(ii) a In the formula, T0Is the target temperature, t1Is the float value at the target temperature, t2Is a target temperature float value;
at a lower temperature limit Tmin< the temperature T < the upper temperature limit TmaxJudging the temperature change condition of the cooking cavity;
automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity; the on-off time ratio is the ratio of the on-time to the off-time of the heating element when a cycle is completed.
2. The method of claim 1, wherein said automatically adjusting the on-off time ratio of said heating element for the next cycle based on the temperature change of said cooking chamber comprises:
acquiring the average temperature of the previous cycle and the average temperature of the current cycle;
when the average temperature of the current cycle is higher than that of the previous cycle, reducing the on-off time ratio of the heating element in the next cycle;
when the average temperature of the current cycle is lower than that of the previous cycle, increasing the on-off time ratio of the heating element in the next cycle;
when the average temperature of the current cycle is equal to the average temperature of the previous cycle, the on-off time ratio of the heating element at the next cycle is kept unchanged.
3. The method of claim 1, wherein said automatically adjusting the on-off time ratio of said heating element for the next cycle based on the temperature change of said cooking chamber comprises:
acquiring the average temperature of the current cycle;
the average temperature in the current cycle is greater than a target temperature T0When the current time is less than the preset time, reducing the on-off time ratio of the heating element in the next cycle;
the average temperature at the current cycle is less than a target temperatureDegree T0Increasing the on-off time ratio of the heating element in the next cycle;
the average temperature at the current cycle is equal to the target temperature T0The on-off time ratio of the heating element at the next cycle is kept constant.
4. The method of claim 1, wherein said active temperature control further comprises:
at said temperature T > said upper temperature limit TmaxWhen the cooking chamber is in the closed state, the heating element is turned off and stops heating the cooking chamber;
at said temperature T < said lower temperature limit TminWhen the cooking chamber is opened, the heating element is turned on and heats the cooking chamber.
5. The method of controlling the temperature of an air fryer according to claim 1, wherein the method further comprises:
controlling the heating element to work in a passive temperature control mode, and executing the active temperature control mode after executing preset cycle times in the passive temperature control mode;
wherein, the passive temperature control mode comprises:
judging the temperature T and the target temperature T0The magnitude relationship of (1);
at the temperature T equal to the target temperature T0While, turning off the heating element;
at the temperature T being less than the target temperature T0When so, the heating element is turned on.
6. The method of controlling the temperature of an air fryer according to claim 5, wherein said heating element has an initial on-off time ratio; the initial on-off time ratio is the ratio of the on-time to the off-time of the heating element when the passive temperature control mode is executed for the last time.
7. The utility model provides an air fryer's temperature regulating device which characterized in that, air fryer includes culinary art chamber and heating element, heating element is with the mode circulation heating of start-up, shut down the culinary art chamber, the device includes:
the acquisition module is used for acquiring the temperature T of the cooking cavity in real time;
the first control module is used for controlling the heating element to work in an active temperature control mode so as to reduce the temperature amplitude of the cooking cavity; wherein the first control module comprises:
a first judgment submodule for judging the real-time temperature T and the lower temperature limit TminUpper temperature limit TmaxThe magnitude relationship between them; wherein, Tmin＝T0-t1，Tmax＝T0+t2(ii) a In the formula, T0Is the target temperature, t1Is the float value at the target temperature, t2Is a target temperature float value;
a second judgment submodule for limiting the temperature lower limit Tmin< the temperature T < the upper temperature limit TmaxJudging the temperature change condition of the cooking cavity;
the first control submodule is used for automatically adjusting the on-off time ratio of the heating element in the next cycle according to the temperature change condition of the cooking cavity; the start-stop time ratio is the ratio of the start-up time to the stop time of the heating element when one-time cyclic heating is completed.
8. The temperature control apparatus for an air fryer according to claim 7, wherein said first control submodule comprises:
a first acquisition submodule: the temperature control device is used for acquiring the average temperature of the previous cycle and the average temperature of the current cycle;
a first adjustment submodule for decreasing the on-off time ratio of the heating element in the next cycle when the average temperature of the current cycle is greater than the average temperature of the previous cycle; when the average temperature of the current cycle is lower than that of the previous cycle, increasing the on-off time ratio of the heating element in the next cycle; when the average temperature of the current cycle is equal to the average temperature of the previous cycle, the on-off time ratio of the heating element at the next cycle is kept unchanged.
9. The temperature control apparatus for an air fryer according to claim 7, wherein said first control submodule comprises:
the second acquisition submodule is used for acquiring the average temperature of the current cycle;
a second regulator submodule for regulating the average temperature of the current cycle to be higher than a target temperature T0When the current time is less than the preset time, reducing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is less than a target temperature T0Increasing the on-off time ratio of the heating element in the next cycle; the average temperature at the current cycle is equal to the target temperature T0The on-off time ratio of the heating element at the next cycle is kept constant.
10. The temperature control apparatus for an air fryer according to claim 7, wherein said apparatus further comprises:
the second control module is used for controlling the heating element to work in a passive temperature control mode, and executing the dynamic temperature control mode after the passive temperature control mode executes preset cycle times;
wherein the second control module comprises:
a third judgment submodule for judging the temperature T and the target temperature T0The magnitude relationship of (1);
a second control submodule for controlling the temperature T to be equal to the target temperature T0While, turning off the heating element; at the temperature T being less than the target temperature T0When so, the heating element is turned on.
11. A computer-readable storage medium, having stored thereon an executable computer program which when executed implements the method for controlling temperature of an air fryer according to any one of claims 1 to 5.
12. An air fryer according to any one of claims 1 to 6, wherein said air fryer performs the method for controlling the temperature of an air fryer, or wherein said air fryer comprises the device for controlling the temperature of an air fryer according to any one of claims 7 to 10, or wherein said air fryer comprises the computer-readable storage medium according to claim 11.
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