JP5923682B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker that provides a heating output suitable for stewed dishes.

  Conventionally, in this type of induction heating cooker, the minimum heating output for continuous heating is determined, and in order to make the heating output smaller than the minimum heating output, the minimum heating output is set to the peak output of the heating output. Duty control was performed. The duty control and the minimum output are often used for heating output in long-time stewed dishes. However, since the convection was insufficient to sufficiently stir the ingredients in the pan with the heating output, the heating output was increased for a short time to convection (see, for example, Patent Document 1). Moreover, there existed some which estimated the quantity of the foodstuff in a pan by a foodstuff quantity estimation means, and changed a heating output according to the quantity of a foodstuff (for example, refer patent document 2).

JP 05-121153 A JP 2009-289594 A

  However, in the conventional configuration, even if the heating output is increased for a certain period of time and the convection in the pan is aroused, if the heating output is increased, the bottom of the pan becomes easy to burn. When it was desired to keep the temperature with the heating output, it was often overheated and was not suitable. In addition, in an induction heating cooker, the temperature at the bottom of the pan is likely to rise to heat the pan itself, but the temperature at the side of the pan is difficult to rise, so in continuous control or duty control with a small peak output of heating output. In addition, there was a problem that cooking was slow because temperature unevenness occurred in the upper and lower parts of the pan or the pan was cooled by the outside air.

  An object of the present invention is to solve the conventional problems described above, and to provide an induction heating cooker that does not require cooked amount estimation means and that can perform a control method suitable for cooking and purpose.

In order to solve the conventional problems, an induction heating cooker according to the present invention includes a top plate on which a pan is placed, a heating coil that is provided below the top plate and that induction-heats the pan, and the heating coil. An inverter for supplying a high frequency current to the heating coil, a heating output setting means for setting the heating output of the heating coil, a display means for displaying the heating output selected by the heating output setting means, and the heating output setting means. Control means for controlling the output of the inverter so as to obtain a heating output, and a time measuring means for measuring time, and the control means includes a heating output whose average heating output is selected by the heating output setting means. When the convection heating mode is selected, the first predetermined heating output W that is larger than the minimum output of the continuous heating mode in which heating is performed with a constant heating output provided in a plurality of stages. The heating cycle including the first heating step of heating for the first predetermined time T1 and the second heating step of heating for the second predetermined time T2 with the second predetermined heating output W2 smaller than the first predetermined heating output W1 is repeatedly continued. The control means has shifted to the convection heating mode, and the control means is configured such that at least two of the heating outputs selected by the heating output setting means increase the average of the selected heating outputs as the average input increases. there therefore also increases the first predetermined heating output W1.

As a result, the convection heating mode is stronger than the conventional continuous heating or the continuous heating with the lowest output as the peak, and the momentum of boiling during heating at the predetermined heating output W1 becomes stronger, and the effect of stirring the pot becomes larger. In a low heating output often used for stewed cooking, cooking can be performed in a short time, and power consumption can be reduced. In addition, when keeping a small amount of stewed food or a prepared stewed food without stirring, the predetermined heating output W1 can be set by changing the duty output to the peak output or the continuous output of the minimum output. It is possible to prevent scorching due to overheating which can occur by inputting, and it is possible to select a heating output suitable for the purpose. In addition, as the average heating output increases, the generation of bubbles during cooking increases, making it easier for the user to set the heating power according to the purpose.

  The induction heating cooker of the present invention allows the user to select a heating output suitable for the purpose, particularly when cooking with stew.

The schematic block diagram of the induction heating cooking appliance in Embodiment 1 of this invention The schematic block diagram of the heating output setting means of the induction heating cooking appliance in Embodiment 1, 3 of this invention Change figure of heating output of induction heating cooking appliance in Embodiment 1 of the present invention The graph which shows the correlation of the peak output of Duty control and boiling juice evaporation rate in the predetermined heating output with the induction heating cooking appliance in Embodiment 1 of this invention The figure which shows the burning of the pot bottom by the difference of the peak output of Duty control in the predetermined heating output with the average heating output of the induction heating cooking appliance in Embodiment 1 of this invention less than 500W Change figure of the heating output 1-3 of the heating output in Embodiment 1 of this invention The schematic block diagram of the induction heating cooking appliance in Embodiment 2 of this invention The figure showing the pot kind determination means in Embodiment 2 of this invention Variation diagram of heating output in Embodiment 4 of the present invention Variation diagram of heating output in Embodiment 4 of the present invention Variation diagram of heating output in Embodiment 4 of the present invention Variation diagram of heating output in Embodiment 4 of the present invention Variation diagram of heating output in Embodiment 4 of the present invention

  According to a first aspect of the present invention, there is provided a top plate for placing a pan, a heating coil provided below the top plate for induction heating the pan, an inverter for supplying a high frequency current to the heating coil, and the heating coil. Heating output setting means for setting the heating output, display means for displaying the heating output selected by the heating output setting means, and controlling the output of the inverter so as to be the heating output set by the heating output setting means Control means, and time measuring means for measuring time, and when the convection heating mode in which the average heating output is selected as the heating output is selected by the heating output setting means, the control means is provided in a plurality of stages. A first heating step of heating for a first predetermined time T1 at a first predetermined heating output W1 greater than a minimum output of a continuous heating mode in which heating is performed at a constant heating output. By shifting to a convection heating mode in which a heating cycle including a second heating step of heating for a second predetermined time T2 with a second predetermined heating output W2 smaller than the first predetermined heating output W1 is continued, conventional continuous heating or Compared to continuous heating with the minimum output in the continuous heating mode as a peak, the convection heating mode has a first predetermined heating output (W1) and the momentum of boiling during heating becomes stronger and the effect of stirring the pot becomes larger. Can be reduced and power consumption can be reduced. In addition, when warming a small amount of cooked food such as stewed food or curry, in the convection heating mode, overheating occurs during the input of the first predetermined heating output (W1), and the bottom of the pan is easy to burn. If duty control with the output as the peak output of the heating output or continuous heating at the minimum output is set, overheating can be prevented, and the user can select a heating output suitable for the purpose.

The first invention, before Symbol control means, said heating at least two of the heating power to be selected by the output setting means with the average input increases, the first heating output to be the selected When the predetermined heating output W1 increases, the generation of bubbles during cooking increases as the average heating output increases, and the user can easily set the heating power according to the purpose.

According to a second aspect of the invention, in particular, in the first aspect of the invention, the control unit is configured to select the heating selected as the average input of at least two of the heating outputs selected by the heating output setting unit increases. By increasing the total time of the first predetermined time T1 and the second predetermined time T2 of the output, the total time of the first predetermined time (T1) and the second predetermined time (T2) is fixed to one value. Rather than setting the average heating output, the convection can be increased by increasing the input time of the first predetermined heating output (W1), so that it is selected when the amount of food is large. In the heating output having a large average input with a large amount, the cooking can be made faster.

According to a third aspect of the present invention, in particular, in the first aspect of the present invention, the control unit includes an operation unit operated by a user, and the control unit is configured to perform the first predetermined heating output W1 or the second predetermined heating output W2 by the operation unit. Or, by arbitrarily changing the first predetermined time T1 or the second predetermined time T2, the convection is more effective when the amount of food is difficult to burn than when the output method of the convection heating mode is determined. By making it large or by avoiding excessive input when the amount of food is low and the menu is easy to burn, the user determines the heating output suitable for the amount of food, menu, and cooking operation. can do.

In the fourth invention, in particular, the second predetermined heating output W2 of any one of the first to third inventions is 0 W, so that the predetermined heating output W1 can be maximized at a certain predetermined output. So you can maximize convection and speed up the boil.

According to a fifth aspect of the present invention, in particular, at least one of the heating outputs selected by the heating output setting means according to any one of the first to fourth aspects of the invention is the peak output of the heating output as the minimum output of the continuous heating mode. Due to the duty control to be output or the continuous output at the minimum output, the peak input is lower than the convection heating mode when the amount of food is small or when keeping warm without stirring. Since the burn can be minimized, it is effective when the amount of cooked food is small or when keeping warm without stirring.

In a sixth aspect of the invention, in particular, in any one of the first to fifth aspects of the invention, the control means gradually reduces the heating output from the first predetermined heating output W1 to the second predetermined heating output W2, or By gradually increasing the second predetermined heating output W2 to the first predetermined heating output W1, the generation of bubbles in the pan gradually decreases or increases, so that the uncomfortable feeling in the boiling state can be reduced.

In a seventh aspect of the invention, in particular, in any one of the first to sixth aspects of the invention, when the control means does not change the predetermined heating output for a predetermined time after starting heating at the predetermined heating output, 1 The predetermined heating output W1 is changed to a heating output smaller than the first predetermined heating output W1 at the start of heating, or the minimum output in the continuous heating mode or the continuous heating mode is set as the peak input. By changing to the Dury control, or by shortening the total time of the first predetermined time T1 and the second predetermined time T2, the convection is reduced as the amount of broth decreases as cooking progresses. By making it smaller, it is possible to reduce the burning of the bottom of the pan and prevent excessive clogging.

In an eighth aspect of the present invention, in particular, in any one of the first to seventh aspects of the present invention, the pan type determination unit includes a pan type determination unit, and the control unit has a conductivity of the first pot type determined by the pan type determination unit. If it is higher than the predetermined value, the convection heating mode is stopped, and the convection heating mode is set by changing to continuous heating of the selected predetermined heating output or duty control with the minimum output of the continuous heating mode as a peak. However, convection is less likely to occur than pots with low conductivity, and the pot type that has a small effect of boiling or clogging has a first duty heating output in convection heating mode by using continuous heating or duty control with the lowest output as the peak. (W1) It is possible to eliminate disadvantages such as splashes that are likely to occur during input, scorching of the bottom of the pan, and the uncomfortable feeling of boiling that the generation of bubbles increases or decreases.

In particular, the ninth aspect of the invention includes any one of the first to seventh aspects of the invention, further comprising a pot type determining means, wherein the control means has a conductivity of the pot type determined by the pot type determining means is the second. When higher than a predetermined value, the difference between the first predetermined heating output W1 and the second predetermined heating output W2 is increased, or the total time of the first predetermined time T1 and the second predetermined time T2 is increased. Therefore, convection is more likely to occur than when the first predetermined heating output (W1), the second predetermined heating output (W2), the first predetermined time (T1), and the second predetermined time (T2) are fixed to one value. Therefore, even if the pot type has a high conductivity and has a small effect of increasing the convection in the convection heating mode, the same effect as that of the pot type having a low conductivity can be obtained.

In a tenth aspect of the invention, in particular, in any one of the first to seventh aspects of the present invention, the pan type determination means is provided, and the control means has a conductivity of the pot type determined by the pot type determination means is third. When lower than a predetermined value, the difference between the first predetermined heating output W1 and the second predetermined heating output W2 is reduced, or the total time of the first predetermined time T1 and the second predetermined time T2 is reduced. Therefore, the first predetermined heating output (W1), the second predetermined heating output (W2), the first predetermined time (T1), and the second predetermined time (T2) are fixed to one value rather than the convection heating mode. Disadvantages that occur during cooking can be reduced, such as the burning of the bottom of the pan, splashing, and the uncomfortable feeling of boiling. Can do.

In an eleventh aspect of the invention, in particular, in any one of the first to tenth aspects of the invention, a stew course that is a control mode is provided, and the control means is convection only when a stew course is selected by the heating output setting means. By heating in the heating mode, it is possible to prevent demerits that can occur in cooking methods other than stewed cooking at a low cost with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of the induction heating cooker according to the first embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of the heating output setting means 5 according to the first embodiment of the present invention.

  In FIG. 1, a heating coil 3 is provided below a top plate 2 made of glass or the like. An inverter 4 is provided below the heating coil 3 and outputs a high-frequency current to the heating coil 3. The pan 1 is induction-heated by the eddy current generated by the high-frequency magnetic field of the heating coil 3. The top plate 2 is provided with heating output setting means 5 constituted by touch keys and display means 6 composed of a liquid crystal screen for displaying the contents set by the heating output setting means 5. Below the top plate 2, there are provided a control means 7 for receiving a signal input by the heating output setting means 5 and changing the heating output, and a time measuring means 7a for measuring time.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, in a state where the pot 1 containing the food is placed on the top plate 2 and is turned on by pressing a power switch (not shown), the user can control the heating output setting means 5 shown in FIG. When the selection key 5b is pressed, the control mode in which the control means 7 operates can be selected. For example, when the user selects the “heating mode” that is the control mode and presses the heating start key 5 a, a signal serving as a heating start command is transmitted to the control means 7. When a heating command is input, the control means 7 supplies a high-frequency current to the heating coil 3 and controls its heating output, thereby inducing an induction current at the bottom of the pan 1 and induction heating the bottom of the pan by Joule heat. The up key 5c and the down key 5d are switches that increase or decrease the setting of the heating output. The control means 7 includes a time measuring means 7a and performs heating output control for outputting to the heating coil 3 based on the measured time information. The display means 6 displays the heating course and heating output selected by the user.

  In addition, the position of the heating output setting means 5 and the display means 6 is not limited to FIG. The heating output setting means 5 only needs to have a function of giving a control command inputted by the user to the control means 7. The display means 6 may be at a position where the heating course and heating output selected by the user can be understood.

  There are 10 levels of heating output that can be set by the user in the heating course, and the nominal output is about 120 W for the average output, about 235 W for the heating output, about 370 W for the heating output, about 500 W for 3 for the heating output, Heating power 4 is about 700 W, Heating power 5 is about 1000 W, Heating power 6 is about 1450 W, Heating power 7 is about 2000 W, Heating power 8 is about 2500 W, Heating power 9 is about 3000 W Yes. The minimum output in the continuous heating mode in which heating is performed with a constant heating output provided in a plurality of stages is 370 W, and the average output is about 120 W, which is a nominal output, with Duty control with a 10-second cycle with 370 W as the peak output. Heating output 1 is a duty control with an average output of about 235 W in a 20 second period (T1 + T2 = 20) with a peak output of 500 W (W1), and heating output 2 is a 20 second period with a peak output of 600 W (W1) ( Duty control with an average output of about 370 W, which is T1 + T2 = 20), and heating control No. 3 is duty control with an average output of about 500 W, which is a 20 second period (T1 + T2 = 20) with 700 W (W1) as a peak output. In a home induction heating cooker, simmering cooking is often performed with a heating output of 3 or less, so the convection heating mode suitable for simmering cooking is mounted at 1 to 3 of heating output.

  Next, the operation in the case where “heating course” is selected by pressing the control mode selection key 5b by the heating output setting means 5 will be described below. FIG. 3 is a change diagram of the heating output in the first embodiment of the present invention. Although the heating is started in the convection heating mode in FIG. 3, the heating may be performed at a high heating output with a continuous output until the broth boils. FIG. 4 is a graph showing the correlation between the peak output of the duty control and the boiling juice evaporation rate at a certain predetermined heating output. The higher the duty control peak output, the larger the boiling juice evaporation rate. FIG. 5 is a comparison of burning of the bottom of the pan when the average heating output is less than 500 W and the continuous heating and the peak output are 500 W and 1000 W. The higher the peak output, the more easily the bottom of the pan becomes burned. The peak output in the convection heating mode can be set from 370 to 3000 W, but the peak output is preferably 1000 W or less in consideration of the burning of the pan bottom.

First, after the “heating course” is selected, heating is started with the heating start key 5a, and when the up key 5c or the down key 5d is pressed to select the heating output 3, the first predetermined heating output (W1) is 700 W. When heating is started and 14.3 seconds of the first predetermined time (T1) is measured by the time measuring means 7a, the second predetermined heating output (W2) shifts to 0 W, and the second predetermined time (T2) is 5 When 7 seconds have elapsed, the cycle of the average heating output of 500 W in which the first predetermined heating output (W1) shifts to 700 W is repeated. By performing duty control at an average input of 500 W, which is a heating output of 3 that is often used for stewed dishes, convection can be made larger than continuous output, and cooking becomes faster (see FIG. 4). In addition, when the heating output is high, emulsification of oil and water in the broth can be promoted, resulting in a mild mouthfeel. The same effect can be obtained even if the heating is started at 0 W and then shifted to 700 W.

  When heating output 2 is selected, heating starts at 600 W of the first predetermined heating output (W1), and when 12.3 seconds of the first predetermined time (T1) elapses, the heating reaches 0 W of the second predetermined heating output (W2). When 7.7 seconds of the second predetermined time (T2) have elapsed, the cycle of the average heating output that shifts to the first predetermined heating output (W1) is repeated at 370 W.

  When 1 is selected as the heating output, heating is started at 500 W of the first predetermined heating output (W1), and when 9.4 seconds of the first predetermined time (T1) has elapsed, the heating reaches 0 W of the second predetermined heating output (W2). When 10.2 seconds of the second predetermined time (T2) elapses, the cycle of the average heating output that shifts to 500 W of the first predetermined heating output (W1) is repeated. In this case, by making the peak output of Duty control smaller than 2-3 of the heating output, the bottom of the pan can be made harder to burn than the heating output of 2-3, so if the food is small or cool It is suitable for reheating warmed jelly-like soup. Moreover, the heating output 1 is often used for cooking such as oden that is slowly boiled without boiling, and in this case, it is not always necessary to speed up the cooking.

  Thus, by increasing the first predetermined heating output (W1) with an increase in the average input of the heating output set by the user, the generation of bubbles during cooking will increase with the heating output, It becomes easier for the user to set the heating power according to the purpose in appearance (FIG. 6). Note that the first predetermined heating output (W1) does not necessarily have to be two consecutive heating outputs as the average input of the heating output increases. For example, to stir the inside of the pan and make cooking more fast, the first predetermined heating output (W1) of heating output 1 is 500 W, the first predetermined heating output (W1) of heating output 2 and heating output 3 May be 700W.

  In addition, when keeping the heat without stirring the curry etc., it is better to reduce the peak output of the duty control because the burning of the bottom of the pan is reduced and it is not necessary to boil down, so the minimum output is the peak output. The heating output "Heat retention" becomes effective.

  Moreover, you may change the 2nd predetermined heating output (W2) of this Embodiment. Accordingly, for example, when the first predetermined heating output (W1) is 700 W and the second predetermined heating output (W2) is 370 W in the heating output 3, the difference between W1 and W2 is reduced, and the degree of increase or decrease in the generation of bubbles is reduced. Since it becomes small, the discomfort of the boiling state which a user feels during cooking can be reduced.

Moreover, you may change the sum total of the 1st predetermined time (T1) and 2nd predetermined time (T2) of this Embodiment with a heating output. For example, the heating output 1 is a 10 second period (T1 + T2 = 10) with a peak output of 500 W (W1), and the heating output 2 is a 20 second period (T1 + T2 = 20) with a peak output of 500 W (W1). No. 3 is a 20 second period (T1 + T2 = 20) with a peak output of 1000 W (W1), and 4 of the heating output is a 30 second period (T1 + T2 = 30) with a peak output of 1000 W (W1). The heating output (W2) is set to 0 W Duty control. Heating outputs 1 to 2 are often used for cooking for a long time, and heating outputs 3 to 4 are used for cooking for a short time. In the case of simmering carefully at 1-2 of the heating output, it is necessary to infiltrate the broth into the ingredients while preventing the ingredients from collapsing without boiling. As the second predetermined heating output (W2) is switched to the first predetermined heating output (W1), the ingredients are gradually stirred from the heating coil to the entire pan, and the speed is gradually increased. As the first predetermined heating output (W1) is switched to the second predetermined heating output (W2), the convection in the pan gradually decreases. In other words, if the heating cycle is long, it takes longer time to stir the ingredients in the whole pan at a high speed, so it tends to boil down and is not suitable for cooking. The heating output 1 and the heating output 2 are often used in accordance with the amount of the cooked product, and the heating output 1 is used when cooking a smaller amount of cooked product. In this case, 1 of the heating output is the first
Even if the predetermined time (T1) is shorter than 2 of the heating output, the effect of stirring the food can be obtained. Cooking with a heating output of 3 to 4 in a short time should have a faster cooking speed and a higher first predetermined heating output (W1). The heating output 3 and 4 are often used according to the amount of cooked food. For example, if there is a large amount of food in a large pan, it will be heated with a heating output of 4, and if the amount of broth decreases, the heating output of 4 will become too strong for the amount of soup, so the heating output will be 3 By switching, it can be heated at a period suitable for the amount of cooking and the amount of broth.

  In addition, when a heating output command is issued with a heating output greater than 0 W, when a means for displaying that the pan is not on the heating coil is provided, the following effects are obtained. For example, in the case where the heating output is switched from 1000 W to 0 W and the pan is removed from the heating coil immediately after heating at the heating output 3 in the heating mode, the period of 20 seconds (T1 + T2 = 20) and the period of 30 seconds (T1 + T2) = 30) are compared. The time of 0W is 10 seconds for the 20-second period, 15 seconds for the 30-second period, and when the pan is removed from the heating coil immediately after switching from 1000W to 0W, a means to display that there is no pan at 0W Does not work, a message indicating that the pan is removed 10 seconds after the 20 second period, and 15 seconds after the 30 second period. Thus, when the heating cycle is short, when the user removes the pan from the heating coil during the heating output, it is possible to speed up the display.

  In the present embodiment, if the predetermined heating output is not changed for a predetermined time after heating is started with the predetermined heating output, the first predetermined heating output (W1) is set to the first predetermined heating output at the start of heating. (W1) The heating output may be changed to a smaller heating output, or the heating may be changed to the Durry control using the continuous heating at the average input of the predetermined heating output or the minimum output of the continuous heating mode as the peak input. For example, the initial setting value of the first predetermined heating output (W1) of 3 for the heating output is 1000 W, 700 W when 10 minutes have elapsed from the start of heating at 3 of the heating output, and 500 W when 10 minutes have passed. Use continuous heating. By this, in the initial stage where there is a lot of boiled juice and the possibility that the bottom of the pot will be burnt is low, the peak value of the duty control is increased by increasing the peak value of the duty control. Or by changing to continuous heating, it is possible to prevent the pan bottom from being burnt. Moreover, when taking soup stock or soup stock, it is not necessary to stir the inside of the pan more than necessary in order to settle the suspended solids into a clear soup, and continuous heating is good in the second half of heating. This may be set in advance in the device or arbitrarily set by a timer setting button (not shown).

  Moreover, continuous heating is possible at a heating output above 370 W, and continuous heating and convection heating modes may be switched by a button (not shown).

(Embodiment 2)
FIG. 7 is a schematic configuration diagram of the induction heating cooker according to the embodiment of the present invention, and FIG. 8 is a diagram illustrating the pot type determining means according to the present embodiment. A difference from the first embodiment is that a pot type determination means 8 is provided. In FIG. 8, the X axis is the input current of the inverter 4, the Y axis is the voltage of the resonant capacitor when a high frequency current is being input to the heating coil 3, and the graph shows a steep slope. The higher the voltage (or the higher the resonance current), the higher the conductivity of the pan. The pot type determination means 8 determines the pot types a to d from the two values. For example, when the pot type determining means 8 determines that the pot type that has started heating is the pot type a having a high conductivity, the convection heating mode is stopped, and the selected predetermined heating output can be continuously heated or continuously heated. Switch to duty control with peak output. The pot type a is more common in aluminum pots, and the effect of the convection heating mode is smaller than other pot types. Therefore, rather than expecting the effect in the convection heating mode, the pot type a is used to prevent the demerits of the uncomfortable feeling of boiling caused by splashing, burning of the bottom of the pot, and the generation of bubbles that increase or decrease during the input of the predetermined heating output (W1). However, the quality of the cooking is good and the user does not feel uncomfortable.

  Further, the difference between the first predetermined heating output (W1) and the second predetermined heating output (W2) is changed according to the determined pot type, or the total time of the first predetermined time (T1) and the second predetermined time (T2) is set. It may be changed. For example, the selected predetermined heating output is 1000 W for the first predetermined heating output (W1), 0 W for the second predetermined heating output (W2), 10 seconds for the first predetermined time (T1), and 10 seconds for the second predetermined time (T2). When the average input per second is 500 W, when the pot type determined by the pot type determination means 8 is the pot type a, which is often found in aluminum pots, the first predetermined heating output (W1) is 1500 W, and the second predetermined heating output. If (W2) is 0 W, the first predetermined time (T1) is 10 seconds, the second predetermined time (T2) is 20 seconds, and it is determined that the pan type c has a large number of thin stainless steel pans, the first predetermined heating The output (W1) is heated at 750 W, the second predetermined heating output (W2) is 0 W, the first predetermined time (T1) is 10 seconds, and the second predetermined time (T2) is 5 seconds. When the first predetermined heating output (W1) is 1000 W, the pot type a has a low input for stimulating the convection in the pot, and the effect of the convection heating mode cannot be obtained sufficiently. Therefore, the first predetermined heating output (W1) In addition, the longer the heating period of the first predetermined time (T1) and the second predetermined time (T2), the greater the effect of inducing convection, so it is better to increase the heating period. If the first predetermined heating output (W1) is increased or the heating cycle is lengthened, the pan bottom will be more easily burned, but the pot type a is less likely to be burned than other pot types, so the disadvantage is increased. No. In the case of pan type c where the bottom of the pan is more likely to be burned than other types of pans, the effect of the convection heating mode is reduced by reducing the first predetermined heating output (W1) and shortening the heating cycle, thereby reducing the burning of the pan bottom. Can be obtained. Thus, it can heat by the heating mode suitable for each pan kind by changing the input method of the convection heating mode according to the pan kind.

(Embodiment 3)
FIG. 2 is a schematic configuration diagram of the thermal power setting means in the embodiment of the present invention. The difference from Embodiment 1 is that a control mode “boiled course” is provided. Heating is performed in the convection heating mode only when the “boiled course” is selected by pressing the control mode selection key 5b by the heating output setting means. Thereby, the demerit which can arise other than a stewed dish can be prevented. For example, the heating output 2 in the stew mode has a first predetermined heating output (W1) of 1000 W, a second predetermined heating output (W2) of 0 W, a first predetermined time (T1) of 7.4 seconds, and a second predetermined time ( When T2) is 12.6 seconds and heating output 2 of “heating course” which is one of the control modes is continuous output of 370 W, it is assumed that milk is heated in a small pan. Milk has the characteristics that it is easy to spill and the bottom of the pan is easily burnt. When 1000 W is input, more bubbles are generated than when 370 W is input, and the liquid level is likely to rise. Moreover, since the bottom of the pan is easily burnt, 370 W continuous output is more suitable when heating milk. Thus, the heating mode suitable for cooking can be selected by providing the stew course.

  The stew course is not limited to one type. For example, it is assumed that when the control mode selection key 5b is pressed once, the “heating course” is pressed twice, “boiled course” is pressed twice, and when the control mode selection key 5b is pressed three times, “small stew course” is set. The “simmering course” has a first predetermined heating output (W1) of 1 to 4 heating outputs of 1000 W, a second predetermined heating output (W2) of 0 W, and a heating cycle of 30 seconds (T1 + T2 = 30). In the “course”, the first predetermined heating output (W1) of 1 to 3 of the heating output is 700 W, the second predetermined heating output (W2) is 0 W, and the heating cycle is 20 seconds (T1 + T2 = 20). Also, in the case of dishes such as boiled potatoes, taro boiled foods or curry that is easy to burn, the “small amount stew course” is suitable because the peak output of Duty control is lower. Thereby, the user can select the course suitable for the amount of cooking and the menu.

  In addition, you may provide an operation means separately from the setting means of a stew course.

(Embodiment 4)
9a to 9e are change diagrams of the heating output in the fourth embodiment of the present invention. 9a to 9e are different from the first embodiment in that the heating output is gradually reduced from the first predetermined heating output (W1) to the second predetermined heating output (W2), or from the second predetermined added power (W2). Gradually increasing to the first predetermined heating output (W1).

  The operation and action of the induction cooking device configured as described above will be described below.

  When heating output 4 is selected, heating is started at 1000 W (W3), and after 11.9 seconds (T3), it shifts to 370 W (W4), and after 3 seconds (T4) has elapsed, it shifts to 0 W (W5). 3. A cycle of shifting to 500 W (W6) after elapse of 1 second (T5) and shifting to 1000 W (W3) after 2 seconds is repeated. Thereby, since the degree of the reduction | decrease or increase of the bubble in a pan becomes loose | gentle, the uncomfortable feeling of a boiling state can be reduced (refer FIG. 9a). Even if W4 and W6 are the same, the same effect can be obtained.

  Note that either W4 or W6 may be omitted (see FIGS. 9b and 9c). In that case, since the input time (T3) of W3 becomes longer, the stirring effect can be made larger than when both W4 and W6 are input.

  It should be noted that when the first predetermined heating output (W1) is shifted to the second predetermined heating output (W2) or the second predetermined heating output (W2) is shifted to the first predetermined heating output (W1), two or more different heating outputs are used. There may be output. (See FIGS. 9d and 9e) In this case, the same effect can be obtained.

  Further, in the present embodiment, the heating output 4 is taken as an example, but the same effect can be obtained by performing the same control even when the heating output is 3 or less or the heating output is 5 or more.

  As described above, the induction heating cooker according to the present invention allows the user to set a heating output suitable for the purpose particularly in stewed cooking, so that it is built-in, a tabletop type used on a table, or a table top. This is effective for induction heating cookers that can be set for output for home use or business use.

DESCRIPTION OF SYMBOLS 1 Pan 2 Top plate 3 Heating coil 4 Inverter 5 Heating output setting means 6 Display means 7 Control means 7a Time measuring means 8 Pot type determination means

Claims (11)

A top plate for placing the pan, a heating coil provided below the top plate for induction heating the pan, an inverter for supplying a high frequency current to the heating coil, and heating for setting a heating output of the heating coil Output setting means, display means for displaying the heating output selected by the heating output setting means, control means for controlling the output of the inverter so as to be the heating output set by the heating output setting means, and time The control means is a constant heating output provided in a plurality of stages when the convection heating mode in which the average heating output is selected as the heating output selected by the heating output setting means is selected by the heating output setting means. A first heating step of heating for a first predetermined time T1 at a first predetermined heating output W1 greater than the minimum output of the continuous heating mode for heating at It has shifted to the convection heating modes to continue repeating the heating cycle comprising a second heating step of the second predetermined time T2 heated with a small second predetermined heating output W2 than the thermal output W1, the control means, the heating output An induction heating cooker that increases the first predetermined heating output W1 of the selected heating output as the average input of at least two of the heating outputs selected by the setting means increases . The control means includes the first predetermined time T1 and the second predetermined time of the selected heating output as the average input of at least two of the heating outputs selected by the heating output setting means increases. The induction heating cooker according to claim 1 , wherein the total time of T2 is increased. The operation means operated by a user is provided, and the control means is configured to control the first predetermined heating output W1 or the second predetermined heating output W2 or the first predetermined time T1 or the second predetermined time T2 by the operating means. The induction heating cooker according to claim 1 , which is arbitrarily changed. The induction heating cooker according to any one of claims 1 to 3 , wherein the second predetermined heating output W2 is 0W. Wherein at least one of the heating power to be selected by the heating output setting means, according to claim 1-4 wherein the Duty control the peak output the lowest output of the heating output of continuous heating mode, or a continuous output of the minimum output The induction heating cooker according to any one of the above. The control means gradually decreases the heating output from the first predetermined heating output W1 to the second predetermined heating output W2, or gradually increases the second predetermined heating output W2 to the first predetermined heating output W1. The induction heating cooker according to any one of claims 1 to 5 . When the predetermined heating output is not changed for a predetermined time after the heating is started at the predetermined heating output, the control means makes the first predetermined heating output W1 smaller than the first predetermined heating output W1 at the start of heating. Change to heating output, change to continuous heating with average input of the predetermined heating output or duty control with the minimum output of the continuous heating mode as peak input, or to the first predetermined time T1 and the second predetermined The induction heating cooker of any one of Claims 1-6 which shortens the total time of time T2. When the pot type determination means includes the pot type determination means, and the conductivity of the pot type determined by the pot type determination means is higher than the first predetermined value, the control unit stops the convection heating mode and selects the predetermined type. The induction heating cooker according to any one of claims 1 to 7 , wherein the induction heating cooker is changed to duty control in which continuous heating of the heating output or the minimum output of the continuous heating mode is a peak. When the pot type determined by the pot type determining unit is higher than a second predetermined value, the control unit includes the first predetermined heating output W1 and the second predetermined type. The induction heating cooker according to any one of claims 1 to 7 , wherein a difference in heating output W2 is increased, or a total time of the first predetermined time T1 and the second predetermined time T2 is increased. When the pot type determination means includes a pot type determination unit, and the conductivity of the pot type determined by the pot type determination unit is lower than a third predetermined value, the first predetermined heating output W1 and the second predetermined type The induction heating cooker according to any one of claims 1 to 7 , wherein a difference in heating output W2 is reduced, or a total time of the first predetermined time T1 and the second predetermined time T2 is reduced. The induction heating according to any one of claims 1 to 10 , comprising a stew course that is a control mode, wherein the control means heats in the convection heating mode only when the stew course is selected by the heating output setting means. Cooking device.

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