CN107087319B - Control method and device for multi-burner induction cooker - Google Patents
Control method and device for multi-burner induction cooker Download PDFInfo
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- CN107087319B CN107087319B CN201710338124.4A CN201710338124A CN107087319B CN 107087319 B CN107087319 B CN 107087319B CN 201710338124 A CN201710338124 A CN 201710338124A CN 107087319 B CN107087319 B CN 107087319B
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
Abstract
The invention provides a control method and a device of a multi-burner induction cooker, which are applied to the multi-burner induction cooker at least comprising a first induction coil and a second induction coil with the same corresponding relation between working frequency and power, target common frequency when the sum of the power of the two induction coils is equal to total target power is obtained according to the target power of the two induction coils, the multi-burner induction cooker works with the target common frequency when the target power of the two induction coils is the same, and the two induction coils are controlled to work in a mode of alternately performing two stages when the target power is different, so that the average power of the two induction coils is equal to the respective target power, thereby ensuring that the working frequency of the two induction coils is not in the range of 1KHz to 18KHz and more than 26KHz under the condition of ensuring normal use of a user, avoiding mutual modulation between the induction coils, and solving the problem that at least two induction coils of the multi-burner induction cooker in the prior art can generate obvious noise when working simultaneously And (5) problems are solved.
Description
Technical Field
The invention belongs to the field of kitchen appliances, and particularly relates to a control method and device for a multi-burner induction cooker.
Background
The induction cooker utilizes alternating current to generate an alternating magnetic field with the direction changing constantly through the induction coil, and eddy current can appear in the conductor in the alternating magnetic field, so that heat can be directly generated at the bottom of a pot without open fire or conduction heating, the heat efficiency is greatly improved, and the induction cooker is widely applied to kitchens of families and various commercial places and has the tendency of replacing the traditional open fire stove.
Besides a basic single-cooking-range induction cooker, a plurality of cooking ranges are arranged in a plurality of commercial kitchens and partial household kitchens, and a plurality of cookers can be heated simultaneously so as to cook a plurality of dishes simultaneously. In the prior art, although the working frequency of the induction coil of the multi-burner electromagnetic is usually in the audible range of human ears, the coil does not generate obvious noise when working alone, but when at least two induction coils work simultaneously, because of the influence of mutual modulation between the induction coils, especially when the working frequency difference of the induction coils is between 1KHz and 18KHz, or is greater than 26KHz, obvious noise can be generated, and the user experience is greatly reduced.
Disclosure of Invention
The invention provides a control method and a control device for a multi-burner induction cooker, and aims to solve the problem that in the prior art, at least two induction coils of the multi-burner induction cooker generate obvious noise when working simultaneously.
The invention is realized in this way, a control method of a multi-burner electromagnetic oven, the multi-burner electromagnetic oven at least comprises a first induction coil and a second induction coil which have the same corresponding relation between the working frequency and the power;
the method comprises the following steps:
acquiring a first target power (Pt1) of the first induction coil and a second target power (Pt2) of the second induction coil, wherein the sum of the first target power (Pt1) and the second target power (Pt2) is a total target power (Σ Pt);
acquiring a target common frequency (fg) when the first induction coil and the second induction coil work at a common frequency and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt);
controlling the first and second induction coils to operate at the target common frequency (fg) at the first and second target powers (Pt1 and Pt2), respectively, when the first target power (Pt1) is equal to the second target power (Pt 2);
when the first target power (Pt1) is not equal to the second target power (Pt2), the first induction coil and the second induction coil are controlled to operate in a manner of alternately performing a first phase and a second phase such that the average power of the first induction coil is equal to the first target power (Pt1) and the average power of the second induction coil is equal to the second target power (Pt 2).
Preferably, the step of controlling the first induction coil and the second induction coil to operate in a first phase and a second phase alternately when the first target power (Pt1) is not equal to the second target power (Pt2) so that the average power of the first induction coil is equal to the first target power (Pt1) and the average power of the second induction coil is equal to the second target power (Pt2) specifically includes:
obtaining a first operating frequency (f1) of the first induction coil when operating at the total target power (Σ Pt) when the first target power (Pt1) is greater than the second target power (Pt 2);
controlling the first induction coil to operate at the first operating frequency (f1) during the first phase, and controlling the first induction coil and the second induction coil to both operate at the target common frequency (fg) during the second phase, such that an average power of the first induction coil during the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil during the first phase and the second phase is equal to the second target power (Pt 2).
Preferably, the formula of the ratio (k) of the duration of the first phase to the duration of the second phase (t2) is:
wherein P2 is the power of the second induction coil when operating at the target common frequency (fg).
Preferably, the step of controlling the first induction coil and the second induction coil to operate in a first phase and a second phase alternately when the first target power (Pt1) is not equal to the second target power (Pt2) so that the average power of the first induction coil is equal to the first target power (Pt1) and the average power of the second induction coil is equal to the second target power (Pt2) specifically includes:
obtaining a second operating frequency (f2) of the second induction coil when operating at the total target power (Σ Pt) when the first target power (Pt1) is less than the second target power (Pt 2);
controlling the second induction coil to operate at the second operating frequency (f2) during the first phase, and controlling the first induction coil and the second induction coil to both operate at the target common frequency (fg) during the second phase, such that an average power of the first induction coil during the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil during the first phase and the second phase is equal to the second target power (Pt 2).
Preferably, the formula of the ratio (k) of the duration of the first phase to the duration of the second phase (t2) is:
wherein P1 is the power of the first induction coil when operating at the target common frequency (fg).
Preferably, the step of obtaining the target common frequency (fg) when the first induction coil and the second induction coil operate at the common frequency and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt) specifically includes:
controlling the first induction coil and the second induction coil to start working at a common maximum working frequency, and gradually reducing the working frequency of the first induction coil and the second induction coil;
acquiring the operating frequency of the first induction coil or the second induction coil as the target common frequency (fg) when the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt).
The invention also provides a control device of the multi-burner electromagnetic oven, wherein the multi-burner electromagnetic oven at least comprises a first induction coil and a second induction coil which have the same corresponding relation between the working frequency and the power;
the device comprises:
a power obtaining module for obtaining a first target power (Pt1) of the first induction coil and a second target power (Pt2) of the second induction coil, wherein the sum of the first target power (Pt1) and the second target power (Pt2) is a total target power (Σ Pt);
a frequency obtaining module, configured to obtain a target common frequency (fg) when the first induction coil and the second induction coil operate at a common frequency and a sum of power of the first induction coil and power of the second induction coil is equal to the total target power (Σ Pt);
an induction coil control module to:
controlling the first and second induction coils to operate at the target common frequency (fg) at the first and second target powers (Pt1 and Pt2), respectively, when the first target power (Pt1) is equal to the second target power (Pt 2);
when the first target power (Pt1) is not equal to the second target power (Pt2), the first induction coil and the second induction coil are controlled to operate in a manner of alternately performing a first phase and a second phase such that the average power of the first induction coil is equal to the first target power (Pt1) and the average power of the second induction coil is equal to the second target power (Pt 2).
Preferably, when the first target power (Pt1) is greater than the second target power (Pt 2):
the frequency acquisition module is further configured to acquire a first operating frequency (f1) of the first induction coil when operating at the total target power (Σ Pt);
the induction coil control module is specifically configured to control the first induction coil to operate at the first operating frequency (f1) during the first phase, and control the first induction coil and the second induction coil to operate at the target common frequency (fg) during the second phase, such that an average power of the first induction coil during the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil during the first phase and the second phase is equal to the second target power (Pt 2).
Preferably, the formula of the ratio (k) of the duration of the first phase to the duration of the second phase (t2) is:
wherein P2 is the power of the second induction coil when operating at the target common frequency (fg).
Preferably, when the first target power (Pt1) is less than the second target power (Pt 2):
the frequency acquisition module is further configured to acquire a second operating frequency (f2) of the second induction coil when operating at the total target power (Σ Pt);
the induction coil control module is specifically configured to control the second induction coil to operate at the second operating frequency (f2) during the first phase, and control the first induction coil and the second induction coil to operate at the target common frequency (fg) during the second phase, such that an average power of the first induction coil during the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil during the first phase and the second phase is equal to the second target power (Pt 2).
Preferably, the formula of the ratio (k) of the duration of the first phase to the duration of the second phase (t2) is:
wherein P1 is the power of the first induction coil when operating at the target common frequency (fg).
Preferably, the specific step of the frequency obtaining module being configured to obtain the target common frequency (fg) when the first induction coil and the second induction coil operate at a common frequency and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt) includes:
the induction coil control module controls the first induction coil and the second induction coil to start working at a common maximum working frequency, and gradually reduces the working frequency of the first induction coil and the second induction coil;
the frequency acquisition module acquires an operating frequency of the first induction coil or the second induction coil as the target common frequency (fg) when a sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt).
The invention provides a control method and a device of a multi-burner induction cooker, which are applied to the multi-burner induction cooker at least comprising a first induction coil and a second induction coil with the same corresponding relation between working frequency and power, target common frequency when the sum of the power of the two induction coils is equal to total target power is obtained according to the target power of the two induction coils, the multi-burner induction cooker works with the target common frequency when the target power of the two induction coils is the same, and the two induction coils are controlled to work in a mode of alternately performing two stages when the target power is different, so that the average power of the two induction coils is equal to the respective target power, the working frequency difference of the two induction coils is not in the range of 1KHz to 18KHz or more than 26KHz under the condition of ensuring normal use of a user, mutual modulation between the induction coils is avoided, and the problem that obvious noise is generated when at least two induction coils of the multi-burner induction cooker work simultaneously in the prior art is solved .
Drawings
FIG. 1 is a schematic flow chart illustrating a method for controlling a multi-burner induction cooker according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a control method of a multi-burner induction cooker according to a preferred embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of a multi-burner induction cooker according to another preferred embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of a multi-burner induction cooker according to still another preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a control method and a device of a multi-burner induction cooker, which are applied to the multi-burner induction cooker at least comprising a first induction coil and a second induction coil with the same corresponding relation between working frequency and power, target common frequency when the sum of the power of the two induction coils is equal to total target power is obtained according to the target power of the two induction coils, the multi-burner induction cooker works with the target common frequency when the target power of the two induction coils is the same, and the two induction coils are controlled to work in a mode of alternately performing two stages when the target power is different, so that the average power of the two induction coils is equal to respective target power, the working frequency of the two induction coils is not in the range of 1KHz to 18KHz or more than 26KHz under the condition of ensuring normal use of a user, mutual modulation among the induction coils is avoided, and the problem that obvious noise is generated when at least two induction coils of the multi-burner induction cooker work simultaneously in the prior art is solved.
As shown in fig. 1, an embodiment of the present invention provides a method for controlling a multi-burner induction cooker, where the multi-burner induction cooker at least includes a first induction coil and a second induction coil, and the corresponding relationships between operating frequencies and powers of the first induction coil and the second induction coil are the same, the method includes steps S101, S102, S103, and S104, and the following steps are detailed:
step S101, a first target power (Pt1) of the first induction coil and a second target power (Pt2) of the second induction coil are obtained, and a sum of the first target power (Pt1) and the second target power (Pt2) is a total target power (Σ Pt).
The user sets for the gear of the kitchen range through control devices such as gear button, knob, touch panel, gear and induction coil's power one-to-one, and induction coil externally does work when the electromagnetism stove is worked, adds the pan through the vortex effect to cook the dish. When the two cooking ranges work simultaneously, the user can set gears for the two cooking ranges respectively, that is, the user can set the target powers of the first induction coil and the second induction coil respectively, in this embodiment, the first target power Pt1 of the first induction coil and the second target power Pt2 of the second induction coil are firstly obtained, so that the power when the two induction coils work is controlled to be equal to the target power set by the user in the subsequent step. In the present embodiment, the total target power Σ Pt is the sum of the first target power Pt1 and the second target power Pt2, that is, Σ Pt is Pt1+ Pt2, and Σ Pt can be obtained by simple addition after Pt1 and Pt2 are obtained.
Step S102, obtaining a target common frequency (fg) when the first induction coil and the second induction coil work at a common frequency, and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt).
After Pt1 and Pt2 are acquired and Σ Pt is calculated, a target common frequency fg is acquired, which is such that the sum of the powers of the first induction coil and the second induction coil equals Σ Pt when the operating frequencies of both the first induction coil and the second induction coil are equal to fg.
In step S103, when Pt1 is equal to Pt2, the first and second induction coils are controlled to operate at the first target power (Pt1) and the second target power (Pt2) respectively at the target common frequency (fg).
Since the correspondence relationship between the operating frequencies and the powers of the first induction coil and the second induction coil is the same, if the first induction coil and the second induction coil are operated at the same frequency, the powers of both are also the same, and therefore, according to Pt1 and Pt2 obtained in step S101, when Pt1 is Pt2, the two induction coils are controlled to operate at the same frequency so that the powers of both are the same, and at the same time, according to the target common frequency fg obtained in step S102, the frequencies of both induction coils are both fg, the sum of the powers of both coils is equal to Σ Pt, so that the powers of both the first induction coil and the second induction coil during operation are equal to the target power set by the user. Because two induction coils work with the same frequency, there is not frequency difference between the two, because can not produce obvious noise because the interact between two induction coils, avoided reducing user experience's problem.
And step S104, when Pt1 is not equal to Pt2, controlling the first induction coil and the second induction coil to work in a mode of alternately performing a first stage and a second stage, so that the average power of the first induction coil is equal to a first target power (Pt1) and the average power of the second induction coil is equal to a second target power (Pt 2).
When Pt1 is not equal to Pt2, the unit working time is used as the minimum duration unit for controlling the work of the induction coil, in one process of using the induction cooker by a user, the working time of the induction coil comprises a plurality of unit working times, and the unit working time is divided into at least two working stages, namely a first stage and a second stage, wherein the first stage and the second stage are alternately carried out. In the first stage and the second stage, the first induction coil and the second induction coil are respectively controlled to work in different working modes in the two stages, for example, work in different frequencies, powers, voltages, currents, space ratios and various combinations, and the frequency difference of the two induction coils is controlled not to be in the range of 1KHz to 18KHz or more than 26KHz, so that obvious noise generated by the interaction between the two induction coils is avoided. Meanwhile, when the induction coils work in different manners in the first stage and the second stage, the average power of the two induction coils in the first stage and the second stage (namely in unit time) is controlled by controlling the time lengths of the first stage and the second stage, so that the average power of the first induction coil is equal to Pt1, and the average power of the second induction coil is equal to Pt2, and therefore, the power of the two induction coils is equal to the target power set by a user in the process of using the induction cooker by the user.
According to the control method provided by the embodiment, when the two induction coils are controlled to work, the frequency difference is not in the range of 1KHz to 18KHz or more than 26KHz all the time, so that obvious noise is avoided, the user experience is improved, the two induction coils are controlled to work in different working stages in different modes, the duration of the different working stages is controlled, the average power of the induction coils in unit time is equal to the power set by a user, and the normal use of the user is not influenced while the noise is avoided.
As shown in fig. 2, as a preferred embodiment of the present invention, step S104 specifically includes step S201 and step S202, which are detailed as follows:
in step S201, when Pt1 > Pt2, a first operating frequency (f1) at which the first induction coil operates at the total target power (Σ Pt) is acquired.
When Pt1 is greater than Pt2, the first induction coil and the second induction coil are controlled to operate in different operating modes in two stages, and in this step, the frequency of the first induction coil at power Σ Pt is obtained, which is the first operating frequency f 1.
Step S202, the first induction coil is controlled to work at a first working frequency (f1) in the first stage, and the first induction coil and the second induction coil are controlled to work at a target common frequency (fg) in the second stage, so that the average power of the first induction coil in the first stage and the second stage is equal to a first target power (Pt1), and the average power of the second induction coil in the first stage and the second stage is equal to a second target power (Pt 2).
After the first working frequency f1 is obtained, in a first stage, the first induction coil is controlled to work at the first working frequency f1, and the second induction coil is controlled not to work, so that in the first stage, the power of the first induction coil is sigma Pt, the power of the second induction coil is zero, and the total power of the two induction coils is sigma Pt; in the second stage, the first induction coil and the second induction coil are controlled to work at the target common frequency fg, the power of the two induction coils is sigma Pt/2, and the total power of the two induction coils is sigma Pt. Meanwhile, the average power of the two induction coils in the unit working time is further controlled by controlling the duration of the first stage and the second stage, so that the average power of the first induction coil is equal to Pt1 and the average power of the second induction coil is equal to Pt2 in the unit working time.
In the first stage, because only the first induction coil works, obvious noise cannot be generated due to the interaction between the two coils, and in the second stage, because the two induction coils have the same frequency power and do not have frequency difference, obvious noise cannot be generated due to the interaction, so that the user experience is improved. Meanwhile, by controlling the time of the first stage and the second stage, the average power of the two coils in unit time is controlled to be equal to the target power set by a user, and the normal use of the user is not influenced.
In the embodiment of the invention, the unit working time is divided into the first stage and the second stage, and the length of the unit working time can be selected according to actual design, production and manufacturing conditions, so that the time lengths of the first stage and the second stage are different according to the unit working time, but as long as the ratio k of the time length of the first stage to the time length of the second stage is not changed, the average power of the two induction coils in the unit working time is not influenced.
In the embodiment of the present invention, the formula of the ratio k of the duration t1 of the first stage to the duration t2 of the second stage is:
wherein P2 is the power of the second induction coil when operating at the target common frequency fg.
For example, when the user sets the target power, Pt1 is 2000W, Pt2 is 1000W, Σ Pt is 3000W, according to step S102, the two induction coils operate at the same frequency, and the total power is equal to Σ Pt is 3000W, so as to obtain the operating frequency of the induction coil at that time, i.e., obtain the target common frequency fg, the power of the two induction coils at that time is 1500, i.e., when the second induction coil operates at the target common frequency fg, the power P1 is P2 is 1500W, according to the formula
K can be calculated to be 0.5, i.e., t1/t2 is 0.5. In addition, since the power of the first induction coil is 3000W and the power of the second induction coil is 0 in the first stage and the power of the two induction coils is 1500W in the second stage, the average power of the first induction coil is within the unit working time formed by the first stage and the second stage
Namely, it is
Average power of second induction coil
Namely, it is
Under the condition of reasonable setting of unit working time, the average working power of the two induction coils can be always equal to the target power set by the user in the using process of the user, and the normal use of the user is ensured.
As shown in fig. 3, as another preferred embodiment of the present invention, step S104 specifically includes step S301 and step S302, which are detailed as follows:
in step S301, when Pt1 < Pt2, a second operating frequency (f2) at which the second induction coil operates at the total target power (Σ Pt) is obtained.
When Pt1 is less than Pt2, the first induction coil and the second induction coil need to be controlled to operate in different operating modes in two stages, and in this step, the frequency of the second induction coil at the power Σ Pt is obtained, which is the second operating frequency f 2.
Step S202, the second induction coil is controlled to work at a second working frequency (f2) in the first stage, and the first induction coil and the second induction coil are controlled to work at a target common frequency (fg) in the second stage, so that the average power of the first induction coil in the first stage and the second stage is equal to a first target power (Pt1), and the average power of the second induction coil in the first stage and the second stage is equal to a second target power (Pt 2).
After the second working frequency f2 is obtained, in a first stage, the first induction coil is controlled not to work, and the second induction coil is controlled to work at the second working frequency f2, so that in the first stage, the power of the first induction coil is zero, the power of the second induction coil is sigma Pt, and the total power of the two induction coils is sigma Pt; in the second stage, the first induction coil and the second induction coil are controlled to work at the target common frequency fg, the power of the two induction coils is sigma Pt/2, and the total power of the two induction coils is sigma Pt. Meanwhile, the average power of the two induction coils in the unit working time is further controlled by controlling the duration of the first stage and the second stage, so that the average power of the first induction coil is equal to Pt1 and the average power of the second induction coil is equal to Pt2 in the unit working time.
In the first stage, because only the second induction coil works, obvious noise cannot be generated due to the interaction between the two coils, and in the second stage, because the two induction coils have the same frequency power and do not have frequency difference, obvious noise cannot be generated due to the interaction, so that the user experience is improved. Meanwhile, by controlling the time of the first stage and the second stage, the average power of the two coils in unit time is controlled to be equal to the target power set by a user, and the normal use of the user is not influenced.
In the embodiment of the invention, the unit working time is divided into the first stage and the second stage, and the length of the unit working time can be selected according to actual design, production and manufacturing conditions, so that the time lengths of the first stage and the second stage are different according to the unit working time, but as long as the ratio k of the time length of the first stage to the time length of the second stage is not changed, the average power of the two induction coils in the unit working time is not influenced.
In the embodiment of the present invention, the formula of the ratio k of the duration t1 of the first stage to the duration t2 of the second stage is:
where P1 is the power of the first inductive coil when operating at the target common frequency (fg).
For example, when the user sets the target power, Pt1 is 1000W, Pt2 is 1500W, and Σ Pt is 2500W, according to step S102, the two induction coils operate at the same frequency, and the total power is equal to Σ Pt 2500W, so as to obtain the operating frequency of the induction coil at that time, that is, obtain the target common frequency fg, the power of the two induction coils at that time is 1250W, that is, when the first induction coil operates at the target common frequency fg, the power P1 is P2 is 1250W, according to the formula, the target common frequency fg is obtained, and the power P2 is set to be 1250W
Can calculateAnd k is 0.25, namely t1/t2 is 0.25. In addition, since the power of the first induction coil is 0 and the power of the second induction coil is 2500W in the first stage and the powers of the two induction coils are both 1250W in the second stage, the average power of the first induction coil is within the unit working time formed by the first stage and the second stage
Namely, it is
Average power of second induction coil
Namely, it is
Under the condition of reasonable setting of unit working time, the average working power of the two induction coils can be always equal to the target power set by the user in the using process of the user, and the normal use of the user is ensured.
As shown in fig. 4, as another preferred embodiment of the present invention, step S102 specifically includes: step S401 and step S402 are detailed as follows:
step S401, controlling the first induction coil and the second induction coil to work at the maximum value of the common frequency, and gradually reducing the common frequency.
In the embodiment of the invention, since the power of the induction coil is inversely related to the operating frequency, that is, the power is larger about a small frequency, the two induction coils are controlled to operate at the designed maximum value of the common frequency, at this time, the power and the frequency of the two coils are the same, and the power is minimum, and then the common frequency at which the two induction coils operate is gradually reduced, at this time, the power of the two induction coils is gradually increased.
Step S402, when the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt), the working frequency of the first induction coil or the second induction coil is obtained as the target common frequency (fg).
And the power of the two induction coils is gradually increased along with the gradual reduction of the common frequency, and when the power of the two induction coils is increased to the sum of the power of the two induction coils is equal to sigma Pt, the frequency of any one of the two induction coils at the moment is obtained, and the frequency is the target common frequency.
According to the control method of the multi-burner induction cooker, in the first stage, only the first induction coil works, so that obvious noise cannot be generated due to interaction between the two coils, and in the second stage, because the two induction coils have the same frequency power and do not have frequency difference, the obvious noise cannot be generated due to interaction, so that the user experience is improved. Meanwhile, by controlling the time of the first stage and the second stage, the average power of the two coils in unit time is controlled to be equal to the target power set by a user, and the normal use of the user is not influenced.
The embodiment of the invention also provides a control device of a multi-cooking-range electromagnetic oven, the multi-cooking-range electromagnetic oven at least comprises a first induction coil and a second induction coil, the corresponding relation between the working frequency and the power of the first induction coil and the second induction coil is the same, and the control device comprises: the device comprises a power acquisition module, a frequency acquisition module and an induction coil control module.
And the power acquisition module is used for acquiring a first target power (Pt1) of the first induction coil and a second target power (Pt2) of the second induction coil, and the sum of the first target power (Pt1) and the second target power (Pt2) is the total target power (sigma Pt).
And the frequency acquisition module is used for acquiring the target common frequency (fg) when the first induction coil and the second induction coil work at the common frequency and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt).
An induction coil control module to:
when the first target power (Pt1) is equal to the second target power (Pt2), the first induction coil and the second induction coil are controlled to work at the first target power (Pt1) and the second target power (Pt2) respectively at the target common frequency (fg).
When the first target power (Pt1) is not equal to the second target power (Pt2), the first and second induction coils are controlled to operate in a manner that the first and second phases are alternately performed such that the average power of the first induction coil is equal to the first target power (Pt1) and the average power of the second induction coil is equal to the second target power (Pt 2).
The specific control method of the control device for the multi-burner induction cooker provided by the embodiment of the present invention is the same as the control method of the multi-burner induction cooker in the above embodiment, and thus the detailed description thereof is omitted here.
The invention provides a control method and a device of a multi-burner induction cooker, which are applied to the multi-burner induction cooker at least comprising a first induction coil and a second induction coil with the same corresponding relation between working frequency and power, target common frequency when the sum of the power of the two induction coils is equal to total target power is obtained according to the target power of the two induction coils, the multi-burner induction cooker works with the target common frequency when the target power of the two induction coils is the same, and the two induction coils are controlled to work in a mode of alternately performing two stages when the target power is different, so that the average power of the two induction coils is equal to the respective target power, the working frequency of the two induction coils is not in the range of 1KHz to 18KHz or more than 26KHz under the condition of ensuring normal use of a user, mutual modulation between the induction coils is avoided, and the problem that obvious noise is generated when at least two induction coils of the multi-burner induction cooker work simultaneously in the prior art is solved .
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The control method of the multi-burner induction cooker is characterized in that the multi-burner induction cooker at least comprises a first induction coil and a second induction coil, wherein the first induction coil and the second induction coil have the same corresponding relation between working frequency and power;
the method comprises the following steps:
acquiring a first target power (Pt1) of the first induction coil and a second target power (Pt2) of the second induction coil, wherein the sum of the first target power (Pt1) and the second target power (Pt2) is a total target power (Σ Pt);
acquiring a target common frequency (fg) when the first induction coil and the second induction coil work at a common frequency and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt);
controlling the first and second induction coils to operate at the target common frequency (fg) at the first and second target powers (Pt1 and Pt2), respectively, when the first target power (Pt1) is equal to the second target power (Pt 2);
obtaining a first operating frequency (f1) of the first induction coil when operating at the total target power (Σ Pt) when the first target power (Pt1) is greater than the second target power (Pt 2);
controlling the first induction coil to operate at the first operating frequency (f1) during a first phase, controlling the second induction coil to not operate during the first phase, and controlling the first induction coil and the second induction coil to both operate at the target common frequency (fg) during a second phase, such that an average power of the first induction coil during the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil during the first phase and the second phase is equal to the second target power (Pt 2);
obtaining a second operating frequency (f2) of the second induction coil when operating at the total target power (Σ Pt) when the first target power (Pt1) is less than the second target power (Pt 2);
controlling the second induction coil to operate at the second operating frequency (f2) during the first phase, controlling the first induction coil to be inoperative during the first phase, and controlling the first induction coil and the second induction coil to both operate at the target common frequency (fg) during the second phase, such that an average power of the first induction coil during the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil during the first phase and the second phase is equal to the second target power (Pt 2).
2. The method of claim 1, wherein the ratio (k) of the duration of the first phase to the duration of the second phase is formulated as:
wherein P2 is the power of the second induction coil when operating at the target common frequency (fg).
3. The method of claim 1, wherein the ratio (k) of the duration of the first phase to the duration of the second phase is formulated as:
wherein P1 is the power of the first induction coil when operating at the target common frequency (fg).
4. A method according to any one of claims 1 to 3, wherein said step of deriving a target common frequency (fg) at which said first and second induction coils operate at a common frequency and the sum of the power of said first induction coil and the power of said second induction coil is equal to said total target power (Σ Pt) comprises:
controlling the first induction coil and the second induction coil to work at the maximum value of the common frequency, and gradually reducing the common frequency;
acquiring the operating frequency of the first induction coil or the second induction coil as the target common frequency (fg) when the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt).
5. The control device of the multi-burner induction cooker is characterized in that the multi-burner induction cooker at least comprises a first induction coil and a second induction coil, wherein the first induction coil and the second induction coil have the same corresponding relation between working frequency and power;
the device comprises:
a power obtaining module for obtaining a first target power (Pt1) of the first induction coil and a second target power (Pt2) of the second induction coil, wherein the sum of the first target power (Pt1) and the second target power (Pt2) is a total target power (Σ Pt);
a frequency obtaining module, configured to obtain a target common frequency (fg) when the first induction coil and the second induction coil operate at a common frequency and a sum of power of the first induction coil and power of the second induction coil is equal to the total target power (Σ Pt);
an induction coil control module to:
controlling the first and second induction coils to operate at the target common frequency (fg) at the first and second target powers (Pt1 and Pt2), respectively, when the first target power (Pt1) is equal to the second target power (Pt 2);
when the first target power (Pt1) is greater than the second target power (Pt 2):
the frequency acquisition module is further configured to acquire a first operating frequency (f1) of the first induction coil when operating at the total target power (Σ Pt);
the induction coil control module is specifically configured to control the first induction coil to operate at the first operating frequency (f1) in a first phase, control the second induction coil to not operate in the first phase, and control the first induction coil and the second induction coil to operate at the target common frequency (fg) in a second phase, such that an average power of the first induction coil in the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil in the first phase and the second phase is equal to the second target power (Pt 2);
when the first target power (Pt1) is less than the second target power (Pt 2):
the frequency acquisition module is further configured to acquire a second operating frequency (f2) of the second induction coil when operating at the total target power (Σ Pt);
the induction coil control module is specifically configured to control the second induction coil to operate at the second operating frequency (f2) in the first phase, control the first induction coil not to operate in the first phase, and control the first induction coil and the second induction coil to operate at the target common frequency (fg) in the second phase, so that an average power of the first induction coil in the first phase and the second phase is equal to the first target power (Pt1), and an average power of the second induction coil in the first phase and the second phase is equal to the second target power (Pt 2).
6. The apparatus of claim 5, wherein the ratio (k) of the duration of the first phase to the duration of the second phase is formulated as:
wherein P2 is the power of the second induction coil when operating at the target common frequency (fg).
7. The apparatus of claim 5, wherein the ratio (k) of the duration of the first phase to the duration of the second phase is formulated as:
wherein P1 is the power of the first induction coil when operating at the target common frequency (fg).
8. The apparatus of any one of claims 5 to 7, wherein the frequency acquisition module is configured to acquire the target common frequency (fg) when the first and second induction coils operate at a common frequency and the sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt), and comprises:
the induction coil control module controls the first induction coil and the second induction coil to work at the maximum value of the common frequency and gradually reduces the common frequency;
the frequency acquisition module acquires an operating frequency of the first induction coil or the second induction coil as the target common frequency (fg) when a sum of the power of the first induction coil and the power of the second induction coil is equal to the total target power (Σ Pt).
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| CN111722547B (en) * | 2020-07-16 | 2021-07-09 | 宁波方太厨具有限公司 | Cooking apparatus, control method thereof, and storage medium |
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| JP2002151241A (en) * | 2000-11-10 | 2002-05-24 | Toshiba Corp | Keep-warm cooker |
| CN101208994A (en) * | 2005-05-04 | 2008-06-25 | E.G.O.电气设备制造股份有限公司 | Method and arrangement for supplying power to several induction coils in an induction apparatus |
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