CN113040616A - Cooking appliance control method and cooking appliance - Google Patents
Cooking appliance control method and cooking appliance Download PDFInfo
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- CN113040616A CN113040616A CN201911362468.4A CN201911362468A CN113040616A CN 113040616 A CN113040616 A CN 113040616A CN 201911362468 A CN201911362468 A CN 201911362468A CN 113040616 A CN113040616 A CN 113040616A
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- cooking appliance
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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
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/32—Time-controlled igniting mechanisms or alarm devices
Abstract
The invention discloses a cooking appliance and a control method thereof. The cooking appliance comprises an air pump for inflating a cooking space of the cooking appliance, and the control method comprises the following steps: collecting a temperature T in a cooking space of a cooking appliance; and when the temperature T is greater than or equal to a preset temperature value T1, sending a first PWM signal to the motor of the air pump to start the motor of the air pump, wherein the duty ratio of the first PWM signal is gradually increased in the starting stage of the motor. Therefore, the duty ratio of the first PWM signal is gradually increased, the starting of the motor is soft starting, the starting voltage of the motor can be gradually increased from 0, and the service life of the motor is prolonged; the starting of the motor is soft starting, the starting rotating speed of the motor can be gradually increased from 0, and the service life of the motor is prolonged.
Description
Technical Field
The invention relates to the field of cooking appliances, in particular to a control method of a cooking appliance and the cooking appliance.
Background
The existing quick cooking utensil can fill cold air into a cooking space through an air pump to prevent overflowing, and can quickly heat with high power. The motor of the air pump is electrically connected with the controller, and the controller controls the motor of the air pump to work so as to control the work of the air pump. When the motor of the air pump is started, the controller controls the air pump to directly rotate at the optimal running speed, so that the starting rotating speed of the motor is high, and the starting voltage of the motor is high. Therefore, the loss of the motor is large, and the service life of the motor is short.
Therefore, the invention provides a control method of a cooking appliance and the cooking appliance, which are used for solving the problems in the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention provides a control method of a cooking appliance, wherein the cooking appliance comprises an air pump for inflating a cooking space of the cooking appliance, and the control method comprises the following steps:
collecting a temperature T in a cooking space of a cooking appliance;
and when the temperature T is greater than or equal to a preset temperature value T1, sending a first PWM signal to the motor of the air pump to start the motor of the air pump, wherein the duty ratio of the first PWM signal is gradually increased in the starting stage of the motor.
According to the control method of the cooking appliance, the duty ratio of the first PWM signal is gradually increased, the starting of the motor is soft starting, the starting voltage of the motor can be gradually increased from 0, and the service life of the motor is prolonged. The starting of the motor is soft starting, the starting rotating speed of the motor can be gradually increased from 0, and the service life of the motor is prolonged.
Optionally, the control method further includes:
and after the starting phase of the motor, sending a second PWM signal to the motor so as to enable the motor to be in a maintaining phase, wherein the duty ratio of the second PWM signal is kept unchanged during the maintaining phase, and the duty ratio of the second PWM signal is larger than or equal to the maximum duty ratio of the first PWM signal. Therefore, the rotation speed of the motor of the air pump is the maintaining rotation speed corresponding to the maintaining duty ratio and is kept unchanged.
Optionally, the motor is cycled alternately between an on state and an off state to operate intermittently, wherein the motor is in the on state during both the start phase and the maintenance phase of the motor. Therefore, the quick cooking without overflowing can be ensured, and the service life of the motor is prolonged.
Optionally, the control method further includes:
and when the motor is in a stop state, stopping sending the PWM signal to the motor. Therefore, the continuous working time of the motor of the air pump can be effectively reduced, and the service life of the motor is prolonged.
Optionally, the control method further includes:
when the motor is in a working state, sending a first heating signal to a heating module of the cooking appliance so as to control the heating module to heat with first heating power;
and when the motor is in a stop state, sending a second heating signal to the heating module to control the heating module to heat with second heating power, wherein the second heating power is smaller than the first heating power.
From this, when the heating module heats with first heating power, the air pump work, when the heating module heats with second heating power, the air pump stop work is long when avoiding overflowing the work duration that reduces the motor of air pump simultaneously, increases the life of motor.
Alternatively, when the motor is in a stopped state, if the temperature T is greater than or equal to the preset temperature value T1, the motor of the air pump is restarted. Therefore, the overflow phenomenon can be effectively avoided.
Alternatively, the period of time that the motor is in the stopped state in one cycle ranges from 1min to 2 min. Thus, the motor can be stopped for a sufficient period of time after the maintenance phase to further increase the service life of the motor.
Optionally, the duration of the motor in the start-up phase is less than or equal to the duration of the motor in the maintenance phase. Therefore, the service life of the motor can be further prolonged.
Optionally, the sum of the duration of the start-up phase and the duration of the hold phase ranges from 3min to 5min in one cycle. Thereby, the cooking effect can be improved.
The invention also provides a cooking appliance comprising an air pump for inflating a cooking space of the cooking appliance, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the program to perform the steps of:
collecting a temperature T in a cooking space of a cooking appliance;
and when the temperature T is greater than or equal to a preset temperature value T1, sending a first PWM signal to the motor of the air pump to start the motor of the air pump, wherein the duty ratio of the first PWM signal is gradually increased in the starting stage of the motor.
According to the cooking appliance, the duty ratio of the first PWM signal is gradually increased, the starting of the motor is soft starting, the starting voltage of the motor can be gradually increased from 0, and the service life of the motor is prolonged. The starting of the motor is soft starting, the starting rotating speed of the motor can be gradually increased from 0, and the service life of the motor is prolonged.
Optionally, the cooking appliance further comprises a control circuit, the processor and memory being configurable as part of the controller, the control circuit comprising:
the control input end is connected with the control end of the controller;
the first end of the first resistor is connected with the control input end;
the first end of the second resistor is connected with the first end of the first resistor, and the second end of the second resistor is grounded;
the output end of the motor is connected with a control port of the motor;
the control end of the switch tube is connected with the second end of the first resistor, the first end of the switch tube is connected with the output end of the motor, the second end of the switch tube is grounded, and the switch tube can control the disconnection or the conduction of the first end and the second end of the switch tube through a PWM signal received by the control end of the switch tube. Thus, the control circuit has a simple structure.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
fig. 1 is a flowchart of a control method of a cooking appliance according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a control circuit of the cooking appliance of FIG. 1;
fig. 3 is a flowchart illustrating a control method of the cooking appliance of fig. 1; and
fig. 4 is a flowchart illustrating a control method of a cooking appliance according to another embodiment of the present invention.
Reference numerals
110: control input 120: a first resistor
130: second resistor 140: motor output end
150: the switching tube 160: electric machine
170: power supply
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
Hereinafter, a cooking utensil according to a preferred embodiment of the present invention will be described. It is understood that the cooking appliance according to the present invention may be an electromagnetic heating electric rice cooker, an electric pressure cooker, an electric stewpan, or other electric heating appliance. The cooking utensil of the present invention may have various functions such as cooking rice, cooking porridge, etc.
The cooking utensil mainly comprises a pot body and a cover body. The cooker body is provided with a cylindrical inner pot containing part, and the inner pot can be freely placed into or taken out of the inner pot containing part so as to be convenient for cleaning the inner pot. The upper surface of the inner pot has a circular opening for containing materials to be heated, such as rice, soup, etc., into the inner pot. The cover body is pivotally connected to the pot body in an openable and closable manner and is used for covering the pot body. When the cover body is covered on the cooker body, a cooking space is formed between the cover body and the inner pot.
The cooking appliance includes a control circuit, an air pump, and a controller. The air pump is used for filling air into the cooking space. As shown in FIG. 2, the motor 160 of the air pump is electrically connected to the power source 170 so that the power source 170 can supply power to the motor 160. The control circuit includes a control input terminal 110, a first resistor 120, a second resistor 130, a motor output terminal 140 and a switching tube 150. The control input terminal 110 is connected to the control terminal of the controller, so that the controller can send a PWM signal to the control circuit through the control input terminal 110, and further control the on/off of the switching tube 150.
In this embodiment, the controller is configured to send a PWM signal to the control circuit through a PWM (Pulse Width Modulation) technique to control the on/off of the switching tube 150 of the control circuit.
The first terminal of the first resistor 120 is connected to the control input terminal 110, and the second terminal of the first resistor 120 is connected to the control terminal of the switching tube 150. Therefore, the first resistor 120 can limit the magnitude of the current between the control input terminal 110 and the control terminal of the switching tube 150, thereby protecting the switching tube 150. The first terminal of the second resistor 130 is connected to the second terminal of the first resistor 120, and the second terminal of the second resistor 130 is grounded.
In this embodiment, the motor output end 140 is connected to a control port of the motor 160 of the air pump to send a PWM signal to the motor 160 of the air pump, so as to control the operation of the motor 160 of the air pump. The switch 150 may be an NPN transistor. The base of the NPN transistor is the control terminal of the switching transistor 150. The collector of the NPN transistor (the first end of the switching tube 150) is connected to the motor output terminal 140, and the emitter of the NPN transistor (the second end of the switching tube 150) is grounded. Thus, the operation of the motor 160 can be controlled by the switching tube 150. Thus, the control circuit has a simple structure. In other embodiments, the switch tube 150 may also be a MOS tube.
In the present embodiment, as shown in fig. 1, a method of controlling a cooking appliance includes:
step S1 is to collect a temperature T in the cooking space of the cooking appliance.
When the cooking appliance heats the food in the inner pot, the temperature in the cooking space rises. As the temperature in the cooking space increases, the liquid in the cooking space gradually boils to generate bubbles. Thus, when the temperature T in the cooking space increases to a threshold value, the liquid in the cooking appliance may be boiled and may overflow. The threshold value may be determined experimentally. For example, a threshold at which spillover is about to occur at different altitudes may be determined experimentally.
In this embodiment, can set up temperature sensor in the culinary art space, like this, the controller can gather the temperature T in the culinary art space in real time when the edible material in the pot in cooking utensil heating through temperature sensor. In this way, the controller can determine whether the liquid in the cooking appliance is about to overflow according to the collected temperature T.
Step S2, when the temperature T is greater than or equal to the preset temperature value T1, sending a first PWM signal to the motor 160 of the air pump to start the motor 160 of the air pump, wherein the duty ratio of the first PWM signal is gradually increased during the start phase of the motor 160.
And in the process of acquiring the temperature T, comparing the acquired temperature T with a preset temperature value T1 in real time. The preset temperature value T1 may be the threshold value described above. If T ≧ T1, it indicates that the liquid in the cooking space will overflow. At this time, the controller determines that the liquid in the cooking space will overflow. The controller controls the start of the motor 160 of the air pump so that the motor 160 of the air pump enters the start-up phase. At this time, the motor 160 is in a working state, and the motor 160 drives the air pump to fill air into the cooking space. The gas filled into the cooking space by the air pump contacts with the bubbles in the cooking space. Thus, the gas with lower temperature can break the bubble contacted with the gas, thereby avoiding the liquid from overflowing. If T < T1, it means that the liquid in the cooking space does not overflow. The temperature T in the cooking space continues to be collected. Preferably, the preset temperature value T1 may be 85 ℃ to 90 ℃.
The rotational speed of the motor 160 is proportional to the duty ratio of the PWM signal of the motor 160. The operating voltage of the motor 160 is proportional to the duty ratio of the PWM signal of the motor 160. The larger the duty ratio of the PWM signal of the motor 160 is, the larger the voltage value of the motor 160 of the air pump is, and the larger the rotation speed of the motor 160 of the air pump is. The smaller the duty ratio of the PWM signal of the motor 160, the smaller the voltage value of the motor 160 of the air pump, and the smaller the rotation speed of the motor 160 of the air pump. Thus, when the duty ratio of the PWM signal of the motor 160 is 1, the voltage value of the motor 160 of the air pump is maximized, and the rotation speed of the motor 160 of the air pump is maximized.
And the air output of the air pump is in direct proportion to the rotating speed of the motor 160 of the air pump. The smaller the rotation speed of the motor 160 of the air pump is, the smaller the air output of the air pump is. The larger the rotation speed of the motor 160 of the air pump is, the larger the air output of the air pump is. Thus, the controller can control the air output of the air pump by controlling the duty ratio of the PWM signal of the motor 160.
There is a lag in time between the onset of boiling of the liquid in the cooking appliance and the occurrence of the overflow phenomenon. That is, the liquid in the cooking appliance does not overflow at the time when the liquid starts to boil, and the liquid in the cooking appliance does not overflow after the liquid boils for a certain period of time. Therefore, during this time period (which may be the soft start time period t1), the air pump may not be operating at the optimum operating condition. That is, during the start-up phase, the motor 160 may not be operating at the optimal operating speed.
In the present embodiment, in the starting stage of the motor 160, the controller sends a first PWM signal to the motor 160 of the air pump through a PWM (pulse width modulation) technique to control the starting of the motor of the air pump. In the starting phase of the motor 160, the controller may control the duty ratio of the first PWM signal through a pulse width modulation technique, so that the duty ratio of the first PWM signal is gradually increased, and further, the starting voltage of the motor may be gradually increased.
In this embodiment, the duty ratio of the first PWM signal is gradually increased, the start of the motor 160 is soft start, and the start voltage of the motor 160 may be gradually increased from 0, so as to increase the service life of the motor. The starting of the motor 160 is soft starting, the starting rotating speed of the motor can be gradually increased from 0, and the service life of the motor is prolonged. Since the starting voltage of the motor 160 is gradually increased, the impact of the starting voltage on the circuit that supplies power to the motor is small.
In the present embodiment, the duration of the start-up phase of the motor 160 of the air pump may be the soft start duration t 1. After the starting phase of the motor 160, the control method further includes:
the second PWM signal is sent to the motor 160 to place the motor 160 in a maintenance phase during which the duty cycle of the second PWM signal remains unchanged, the duty cycle of the second PWM signal being greater than or equal to the maximum duty cycle of the first PWM signal.
During the start-up phase of the motor 160, the rotational speed of the motor 160 increases. When the motor 160 is in the operating state, after the motor 160 is in the start stage, the motor 160 of the air pump enters the maintenance stage, and the controller stops sending the first PWM signal to the motor 160.
The duration of the sustain phase may be a sustain duration t 2. During the maintenance phase, the controller sends a second PWM signal to the motor 160 through a PWM technique. The controller controls the maintaining duty ratio of the second PWM signal to be unchanged. In this way, in the maintaining stage, the rotation speed of the motor 160 of the air pump is the maintaining rotation speed corresponding to the maintaining duty ratio, and the rotation speed of the motor 160 is not changed. It should be noted that, one skilled in the art can set the soft-start time period t1 and the sustain time period t2 as required.
In the sustain phase, a sustain duty cycle of the second PWM signal may be greater than a maximum value of a duty cycle of the first PWM signal. At this time, the controller may directly adjust the duty ratio of the PWM signal to the maintenance duty ratio in the maintenance stage of the motor 160 of the air pump. It is also possible to gradually increase the duty ratio from the maximum value of the duty ratio in the start-up phase to the maintenance duty ratio and then maintain the maintenance duty ratio. In an embodiment not shown, the maintenance duty cycle may also be equal to the maximum value of the duty cycle of the first PWM signal.
Preferably, the duration of the motor in the start-up phase is less than or equal to the duration of the motor in the maintenance phase. Thereby, the service life of the motor 160 can be improved. Further preferably, t1 ≦ 2 s. Thereby, the service life of the motor 160 can be further improved.
Preferably, t1+ t2 ranges from 3min to 5min in one cycle. Thereby, the cooking effect can be improved.
In this embodiment, the method for controlling a cooking appliance further includes:
during cooking, the motor 160 is alternately cycled between an operating state and a stopped state to operate intermittently. In one cycle of the motor 160, the motor 160 first enters a start phase of the operating state, enters a maintenance phase after the start phase, and after the maintenance phase, the motor 160 stops rotating to enter a stop phase. After the time period for stopping the rotation of the motor 160 reaches the later time period T3, if the temperature T is greater than or equal to the preset temperature value T1, the motor 160 of the air pump is restarted, and at this time, the current cycle is completed, and the motor 160 enters the next cycle period. Therefore, the quick cooking without overflowing can be ensured, and the service life of the motor 160 is prolonged.
Preferably, when the motor 160 is in the stop stage, the PWM signal is stopped from being transmitted to the motor 160, so that the motor 160 stops operating.
After the rotational speed of the motor 160 of the air pump is maintained at the maintained rotational speed for the maintained rotational speed maintaining period t2, the controller may stop sending the PWM signal to the motor 160. That is, the controller does not send the second PWM signal to the motor 160 after the sustain period, nor does the controller send the first PWM signal to the motor 160. Thus, the motor 160 stops rotating after the maintenance phase and enters the stop phase. The duration of the stop phase of the motor 160 may be a duration t 3. One skilled in the art can set time period t3 as desired. When the motor is in the stop stage, the air pump stops working. Therefore, the continuous working time of the motor 160 of the air pump can be effectively reduced, and the service life of the motor 160 can be prolonged.
In this embodiment, after the time period t3 when the motor 160 stops operating, the method for controlling the cooking appliance further includes:
if the temperature T is greater than or equal to the preset temperature value T1, the motor 160 of the air pump is restarted. Thus, after the time period during which the motor 160 stops rotating reaches the time period T3, if the temperature T is greater than or equal to the preset temperature value T1, the motor 160 of the air pump is restarted. Therefore, the overflow phenomenon can be effectively avoided.
Preferably, the duration t3 ranges from 1min to 2min in one cycle. Thus, the motor 160 may be stopped after the maintenance phase for a sufficient period of time to further increase the useful life of the motor 160.
In this embodiment, the method for controlling a cooking appliance further includes:
when the air pump works, a first heating signal is sent to a heating module of the cooking utensil so as to control the heating module to heat at a first heating power;
and the motor of the air pump is in a stop state, so that when the air pump stops working, a second heating signal is sent to the heating module to control the heating module to heat at a second heating power, and the second heating power is smaller than the first heating power.
The motor of the air pump is in a working state, so that the heating module is heated with first heating power when the air pump works. The first heating power may be a maximum heating power of the cooking appliance. Thus, the air pump function can be fully exerted. When the air pump stops working, the heating module is heated by the second heating power. The second heating power is less than the first heating power. The second heating power may also be equal to 0. Therefore, when the heating module heats with the first heating power, the air pump works, the heating module heats with the second heating power, the air pump stops working, the overflow can be avoided, the working duration of the motor 160 of the air pump is reduced, and the service life of the motor 160 is prolonged.
The invention also provides a cooking appliance. The cooking appliance comprises an air pump for inflating a cooking space of the cooking appliance, a memory, a processor and a computer program stored on the memory and executable on the processor, the memory and the processor being configured as the aforementioned controller. The processor executes the program to realize the following steps:
collecting a temperature T in a cooking space of a cooking appliance;
when the temperature T is greater than or equal to the preset temperature value T1, a first PWM signal is sent to the motor 160 of the air pump to start the motor 160 of the air pump, wherein the duty ratio of the first PWM signal is gradually increased during the start-up phase of the motor 160.
In this embodiment, the duty ratio of the first PWM signal is gradually increased, the start of the motor 160 is soft start, and the start voltage of the motor 160 may be gradually increased from 0, so as to increase the service life of the motor. The starting of the motor 160 is soft starting, the starting rotating speed of the motor can be gradually increased from 0, and the service life of the motor is prolonged.
As shown in fig. 3, the control method of the present invention is as shown in fig. 3, and the control method specifically includes:
step S101, cooking is started, and step S102 is executed.
And S102, acquiring the temperature T, and executing S103.
Step S103, judging that the current T is more than or equal to T1, if so, indicating that the liquid in the cooking space is about to overflow, executing step S104, otherwise, indicating that the liquid in the cooking space is not overflowed, and returning to execute step S102.
In step S104, the controller controls the motor 160 of the air pump to rotate so as to start the air pump, and then step S105 is performed.
Step S105, start the first timer, and execute step S106.
In the first embodiment, a first time is counted in one cycle of the motor 160, and then whether the motor 160 is in the operating state or in the stop state is judged according to the duration t of the first time; if the motor 160 is determined to be in the working state, whether the motor is in the starting stage or the maintaining stage is determined according to the time length t of the first timing.
Step S106, determining that the current first timing duration t is less than t1+ t2, if yes, the motor 160 is in a working state (including a start stage and a maintenance stage), at this time, step S107 is executed, otherwise, the motor is in a stop working state, at this time, step S110 is executed.
Step S107, judging that the current first timing duration t is less than t1, if so, indicating that the motor is in a starting stage, and executing step S108 at the moment, otherwise, indicating that the motor is in a maintaining stage, and executing step S109 at the moment.
In step S108, the controller sends a first PWM signal to the motor 160 to start the motor.
In step S109, the controller sends a second PWM signal to the motor 160 to maintain the motor 160 in the maintenance phase.
In step S110, the controller stops sending the PWM signal (including the first PWM signal and the second PWM signal) to the motor 160 to stop the motor 160.
Step S111, determining that the current first timing duration T < T1+ T2+ T3, if yes, indicating that the current cycle period is completed, resetting T and T (for example, making T equal to 0 and T equal to 0), returning to step S102 to enter the next cycle period, otherwise, indicating that the motor 160 is still in the current cycle period, and returning to step S110.
In another embodiment, as shown in fig. 4, a control method of the present embodiment includes:
step S201, cooking is started, and step S202 is executed.
Step S202, collecting the temperature T, and executing step S203.
Step S203, judging that the current T is more than or equal to T1, if so, indicating that the liquid in the cooking space is about to overflow, at this time, executing step S204, otherwise, indicating that the liquid in the cooking space is not overflowing, and at this time, returning to execute step S202.
In step S204, the controller controls the motor of the air pump to rotate, so that the air pump starts to operate, and step S205 is executed.
Step S205 starts the first timer, and step S206 is executed.
Step S206, determining that the current first timing duration t is less than t1+ t2, if yes, the motor is in a working state (including a starting stage and a maintaining stage), at this time, step S207 is executed, otherwise, the motor is in a stop working state, at this time, step S211 is executed.
Step S207, the second timer is started, and step S208 is executed.
In the present embodiment, the second timer is started if it is determined that the motor is in the operating state during one cycle of the motor 160. Then, it is determined whether the motor is in the start-up phase or the maintenance phase according to the duration t4 of the second timer. That is, in the second embodiment, in one cycle period of the motor 160, first timing is performed, and then it is determined whether the motor 160 is in the operating state or in the stopped state according to a time period t of the first timing; if the motor 160 is determined to be in the working state, the second timing is started, and then whether the motor is in the starting stage or the maintaining stage is determined according to the duration t4 of the second timing.
And S208, judging that the current second timing duration t4 is less than t1, if so, indicating that the motor is in a starting stage, and executing S209 at the moment, otherwise, indicating that the motor is in a maintaining stage, and executing S210 at the moment.
In step S209, the controller sends a first PWM signal to the motor 160 to start the motor.
In step S210, the controller sends a second PWM signal to the motor 160 to maintain the motor 160 in the maintenance phase.
In step S211, the controller stops sending the PWM signals (including the first PWM signal and the second PWM signal) to the motor 160 to stop the motor 160.
In step S212, it is determined that the current first time period T < T1+ T2+ T3, if yes, it indicates that the current cycle is completed, at this time, T T, T and T4 are reset (for example, T is 0, and T4 is 0), and the process returns to step S202 to enter the next cycle. Otherwise, it indicates that the motor 160 is still in the current cycle, and then the process returns to step S211.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
The flows described in all the preferred embodiments described above are only examples. Unless an adverse effect occurs, various processing operations may be performed in a different order from the order of the above-described flow. The above-mentioned steps of the flow can be added, combined or deleted according to the actual requirement.
Further, the commands, command numbers, and data items described in all the preferred embodiments described above are only examples, and thus the commands, command numbers, and data items may be set in any manner as long as the same functions are achieved. The units of the terminal of the preferred embodiments may also be integrated, further divided or subtracted according to actual needs.
Claims (11)
1. A control method of a cooking appliance, wherein the cooking appliance includes an air pump for inflating a cooking space of the cooking appliance, the control method comprising:
collecting a temperature T within the cooking space of the cooking appliance;
when the temperature T is greater than or equal to a preset temperature value T1, sending a first PWM signal to a motor (160) of the air pump to start the motor (160) of the air pump, wherein the duty ratio of the first PWM signal is gradually increased in a starting phase of the motor (160).
2. The control method of a cooking appliance according to claim 1, further comprising: after a start-up phase of the motor (160), sending a second PWM signal to the motor (160) to place the motor (160) in a maintenance phase during which a duty cycle of the second PWM signal remains unchanged, the duty cycle of the second PWM signal being greater than or equal to a maximum duty cycle of the first PWM signal.
3. The control method of a cooking appliance according to claim 2, wherein the motor (160) is alternately cycled between an operating state and a rest state for intermittent operation, wherein the motor (160) is in the operating state during both the start-up phase and the maintenance phase of the motor (160).
4. The control method of a cooking appliance according to claim 3, further comprising:
when the motor (160) is in the stopped state, stopping sending the PWM signal to the motor (160).
5. The control method of a cooking appliance according to claim 4, wherein the control method further comprises:
when the motor (160) is in the working state, sending a first heating signal to a heating module of the cooking appliance to control the heating module to heat at a first heating power;
when the motor (160) is in the stop state, sending a second heating signal to the heating module to control the heating module to heat with a second heating power, wherein the second heating power is smaller than the first heating power.
6. A control method of a cooking appliance according to claim 3, characterized in that when the motor (160) is in the stop state, if the temperature T is greater than or equal to the preset temperature value T1, the motor (160) of the air pump is restarted.
7. The method of claim 4, wherein the motor (160) is in the stopped state for a period of time ranging from 1min to 2min in one cycle.
8. The method of claim 2, wherein a duration of time that the motor (160) is in the start-up phase is less than or equal to a duration of time that the motor (160) is in the maintenance phase.
9. The method of claim 3, wherein the sum of the duration of the start-up phase and the duration of the maintenance phase ranges from 3min to 5min in one cycle.
10. A cooking appliance comprising an air pump for inflating a cooking space of the cooking appliance, a memory, a processor and a computer program stored on the memory and executable on the processor, wherein execution of the program by the processor effects the steps of:
collecting a temperature T within the cooking space of the cooking appliance;
when the temperature T is greater than or equal to a preset temperature value T1, sending a first PWM signal to a motor (160) of the air pump to start the motor (160) of the air pump, wherein the duty ratio of the first PWM signal is gradually increased in a starting phase of the motor (160).
11. The cooking appliance of claim 10, further comprising a control circuit, the processor and the memory configurable as part of a controller, the control circuit comprising:
a control input (110), the control input (110) being connected to a control terminal of the controller;
a first resistor (120), wherein a first end of the first resistor (120) is connected with the control input end (110);
a second resistor (130), a first end of the second resistor (130) being connected to the first end of the first resistor (120), a second end of the second resistor (130) being connected to ground;
a motor output (140), the motor output (140) being connected to a control port of the motor (160);
the control end of the switch tube (150) is connected to the second end of the first resistor (120), the first end of the switch tube (150) is connected to the motor output end (140), the second end of the switch tube (150) is grounded, and the switch tube (150) can control the first end and the second end to be disconnected or connected through a PWM signal received by the control end of the switch tube (150).
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| CN201911362468.4A CN113040616A (en) | 2019-12-26 | 2019-12-26 | Cooking appliance control method and cooking appliance |
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