JP6827895B2 - Induction heating cooker - Google Patents

Description

The present invention relates to an induction cooker.

Conventionally, as described in Patent Document 1, in an induction heating cooker, a top plate on which a cooking pot is placed on the upper surface of the main body, a grill storage arranged below the top plate, and this grill storage are used. A door for putting in and out the food to be cooked, a grill on which the food to be cooked is placed, and a grid provided between the door, the saucer, and the grid on which the grill is placed. Induction cookers equipped with heating means for heating cooked foods are common.

Japanese Unexamined Patent Publication No. 2011-243320

In the induction heating cooker described in Patent Document 1, when making a large amount by one cooking or when two cookings are performed at the same time on the top plate, one heating coil and one cooking utensil are small. There is a problem that it cannot be made in large quantities and it takes time to cook twice.

The induction heating cooker of the present invention was made in order to solve the above-mentioned problems, in which a plate 3 is arranged, a plurality of heating coils 13 are arranged in a main body 2 below the plate 3, and the temperature of the object to be heated. The infrared sensor S and the temperature detecting element 21 for detecting the above, the inverter means 72 for supplying power to the heating coil 13, and the control means for controlling the inverter means 72 based on the detection temperature of the infrared sensor S and the temperature detecting element 21. In the induction heating cooker provided with the 74, the control means 74 can simultaneously heat and control a plurality of the plurality of heating coils 13, and can control the increase value of the detection temperature of the infrared sensor S and the temperature detection element 21. When the determination is made and the increase value of the detected temperature shows a specific value or more, the supply of power to the heating coil 13 is stopped or reduced, and the heating coil 13 has the heating coil right 13a, the heating coil left 13b, and after the heating coil. It has 13c, 13c after the heating coil is arranged behind the heating coil right 13a or the heating coil left 13b, and the grill pan 42 is not arranged with the heating coil right 13a, the heating coil left 13b, the heating coil after 13c and the heating coil after 13c. It is characterized in that it can be placed on the rear of the heating coil left 13b or the heating coil right 13a for heating.

According to the induction heating cooker of the present invention, the grill pan is used on the top plate, and a plurality of heating coils are individually controlled at the same time to eliminate uneven heating or to make a temperature difference depending on the location of the grill pan. , It becomes possible to provide various cooking methods.

It is a perspective view of the state which the built-in type induction heating cooker is housed in the system kitchen. It is explanatory drawing which shows the upper surface of the induction heating cooker of one Example of this invention. It is explanatory drawing which shows the state which shows the state which the plate on the upper surface of the induction heating cooker shown in FIG. It is sectional drawing which shows the internal structure seen from the side surface of an induction heating cooker. It is explanatory drawing which shows the upper surface operation part of the induction cooking apparatus of one Example of this invention. It is a block diagram explaining the heating part of the induction cooking apparatus of one Example of this invention, and the control thereof. It is explanatory drawing which shows the region which puts the plate and the grill pan on the upper surface of the induction heating cooker of one Example of this invention. It is a figure which shows an example of the grill pan used in the induction heating cooker of this invention.

Hereinafter, examples of the present invention will be described with reference to the drawings. 1 to 8 show an embodiment of the induction cooking device of the present invention. The cooker shown in FIG. 1 is a built-in type induction cooking cooker in which three pot mounting portions 6a, 6b, and 6c are provided on a plate 3.

In this embodiment, not a built-in type that fits into the kitchen, but a stationary type cooking cooker that is placed in the kitchen may be used.

The main body 2 of the cooking cooker is incorporated by dropping it from the upper surface of the system kitchen 1 and installing it. After installation, the operation unit panel 5 can be operated from the front portion of the system kitchen 1.

The pot of the object to be heated (not shown) used for cooking uses non-crystallized glass arranged on the upper surface of the main body 2 as a base material, and uses a heat-resistant paint having a heat-resistant temperature of at least 300-odd degrees. The back surface is painted with letters and almost the entire surface, and the front surface is placed on a plate 3 with glass printing to prevent the pot from slipping.

A cooking pot (not shown) can be cooked by being placed on the mounting portion 6 drawn on the plate 3. In the mounting portion 6, the mounting portion right 6a and the mounting portion left 6b are arranged in front of the upper surface of the plate 3 on the upper surface of the main body 2, and the mounting portion rear 6c is located behind (left rear portion) of both mounting portions 6b. Have been placed. Here, the rear 6c of the mounting portion may be the back (rear right portion) of the right 6a of the mounting portion.

The infrared sensor window right 26a and the infrared sensor window left 26b in FIG. 2 are inside the mounting portion right 6a and the mounting portion left 6b, respectively. A heating coil unit 25 (FIG. 3), which will be described later, for heating the cooking pot is installed under each mounting portion 6 with the plate 3 interposed therebetween.

6c after the mounting portion is a place that is difficult for the cook to reach. For this reason, when the cooking pot is placed on the front right 6a of the mounting portion and the left 6b of the mounting portion, when the cooking pot is reached to the 6c portion after the mounting portion, the right 6a of the mounting portion and the left 6b of the mounting portion are reached. Due to the steam generated during cooking from the placed cooking pot, it is difficult to cook by moving the hand 6c after the placing part. Therefore, the type of cooking performed 6c after the placing portion is suitable for cooking in which the cook does not have to move much, mainly for cooking such as stewing and heat retention. In addition, since the heating power for boiling and heat retention is weak and the maximum power consumption is limited, the heating power of the heating coil 13c (FIG. 6) installed 6c after the mounting portion is applied to the right 6a of the mounting portion and the mounting portion. It is set to be weaker than the heating coil right 13a (FIG. 6) and the heating coil left 13b (FIG. 6) installed corresponding to the left 6b, and to reduce power consumption.

In FIGS. 1 and 2, a frame 14 is provided to protect the peripheral end faces of the plate 3. It is composed of a frame front 14a attached to the front upper edge of the plate 3, a frame rear 14b attached to the rear upper edge of the plate 3, a frame 14c attached to the right upper edge, and a frame left 14d attached to the left upper edge. ing. In this example, the frame is divided into 4 pieces, but it can be integrated, 2 pieces, or any number of pieces, and it is not necessary to attach it to the 4 sides of the plate 3, only in front of the plate 3, only in the rear, and in the front and back. Only two sides or two left and right sides may be used.

A heating coil unit 25 and electronic components, which will be described later, are provided inside the main body 2, and an intake port 7 for sucking air from the outside of the main body 2 is provided to cool these. The illustrated intake port 7 is provided on the right side of the frame rear 14b on the upper surface of the main body 2 toward the exhaust port 8 described later, but the main body 2 is to prevent suction of steam from the pot or suction of suddenly boiled water droplets. An intake port may be provided on the operation panel 5 side instead of being provided on the upper surface. Further, the intake port 7 may be the exhaust port 8.

The air sucked in through the intake port 7 is discharged to the outside through the exhaust port 8 after cooling the heating coil unit 25 and electronic components that generate heat inside the main body 2.

Next, the heating coil will be described with reference to FIG. The heating coil unit 25 for heating a cooking pot (not shown) is composed of a heating coil 13, a coil base 24, and ferrite (not shown). The heating coil unit 25 is installed below the plate 3 of each mounting portion 6 so as to open a certain gap between the plate 3 and the heating coil 13. This gap is for cooling the heat-resistant paint surface and the heating coil applied to the plate 3 and the plate 3 by flowing a cooling air described later. A heating coil unit right 25a is provided below the mounting portion right 6a, a heating coil unit left 25b is provided below the mounting portion left 6b, and a heating coil unit rear 25c is provided below the mounting portion 6c. There is.

A litz wire is used for the winding of the heating coil 13 in order to suppress the skin effect. A voltage of several tens of kHz and several hundreds of volts is applied to the heating coil 13 from the inverter means 72 described later in order to heat the cooking pot (not shown).

The coil base 24 fixes the heating coil 13 from below, and ferrite (not shown) is embedded in the coil base 24.

The temperature of the pot is detected by the temperature detecting elements 21 (21a, 21b, 21c) provided in the heating coil 13 such as during automatic cooking. The temperature of the bottom of the pot is indirectly detected via the plate 3. The temperature detection element 21 uses a thermistor, and the number is not limited to one, and a plurality of temperature detection elements 21 may be provided. Further, an infrared sensor S that detects infrared rays from the infrared sensor window right 26a and the infrared sensor window left 26b in FIG. 2 and detects the temperature may be provided. The temperature of the pot is detected by the infrared sensor S provided on the heating coil 13 and the temperature detecting element 21 during automatic cooking. Next, the inverter means 72 for exciting the heating coil 13 and its cooling will be described with reference to FIG. 4 (see FIG. 6 for the heating coil 13 and the inverter means 72). FIG. 4 is a vertical cross-sectional view of the cooking cooker main body 2, and a substrate right 31a on which the inverter means 72 is mounted is shown in the upper center. A right heating coil 25a is arranged on the upper stage.

Each part that generates heat is cooled by the air sent by the blower fan 20. The air that has entered through the intake opening 27 enters the fan intake port 29 through the duct 28. The air is sent to the right side 31a of the substrate through the right discharge port 30 by the blower fan 20, cools the electronic component 32, and then exits from the upper discharge part 33b. The air discharged from the upper discharge portion 33b cools the heating coil right 25a and the plate 3 and is discharged from the exhaust port 8. Further, air is also sent from the blower fan 20 to the substrate 31 and the heating coil unit 25 from the substrate left 31b, the heating coil unit left 25b, and the heating coil unit rear 25c, and after cooling, the air is discharged from the exhaust port 8.

Next, the operation of the heating coil 13 will be described with reference to FIG. The operation of the heating coil 13 is performed by the capacitance type or mechanical upper surface operation unit 9 provided on the plate 3 or the front frame front 14a. The upper surface operation unit right 9a, the upper surface operation unit rear 9c, and the upper surface operation unit left 9b are arranged from the right corresponding to the mounting portion right 6a, the mounting portion rear 6c, and the mounting portion left 6b on which the pot is placed. This is an arrangement that allows the operator to intuitively understand the relationship between the pot and the operation unit.

As is clear from the figure, the upper surface operation unit right 9a and the upper surface operation unit left 9b have the same keyboard layout. Therefore, the operation of the heating coil right 13a will be described below as a representative. Reference numeral 48 denotes an off / start key for starting or stopping cooking, and the LED lamp 53 lights up during cooking.

The cooking power is selected by the heat key 49. It is divided into four stages of keys, which are low heat, low heat, medium heat, and high heat, and individual keys are provided so that the required heat power can be set with a single operation. As a guideline for each thermal power, for example, if a maximum of 12 stages of thermal power adjustment can be performed, the relationship between each thermal power and power consumption is equivalent to 100W for the "1" stage, 200W for the "2" stage, and 300W for the "3" stage. , "4" stage is 400W, "5" stage is 500W, "6" stage is 800W, "7" stage is 1.1kW, "8" stage is 1.4kW, "9" stage is 1.6kW, " The "10" stage is 2 kW, the "11" stage is 2.5 kW, and the "12" stage is 3 kW. The numbers at each stage are numbers displayed on the upper surface display unit 10 described later as a guideline for thermal power. In addition, the relationship between the thermal power notation and the actual stage display is "1" for low heat, "2", "3", "4", "5" for low heat, and "6", "7", "8" for medium heat. , "9" and "10" are assigned to high heat, and "11" and "12" are assigned to high power. The thermal power key 49 can be directly set to the typical thermal power of four stages of thermal power, the low heat key 49a is "1", the low heat key 49b is "4", the medium heat key 49c is "7", and the high heat key 49d is "10". The firepower can be set to, and the LED lamp 54 in the set key portion lights up.

Reference numeral 51 denotes a timer key that is mainly selected when performing timer cooking such as stewing or heat retention. 52 is a menu key for selecting automatic cooking rice cooking, fried food, boiling water, etc. By pressing the menu key 52, a menu is displayed on the upper surface display unit 10 described later, and is displayed each time the menu key 52 is pressed. The menu is switched, and the menu to be used is selected accordingly.

In addition, the setting key 50 can be used to adjust the heating power, set the time for timer cooking, set the amount of rice for cooking rice, set the finish adjustment for automatic cooking, and set the oil temperature for deep-fried food. .. The setting key 50 is composed of an UP key 50a for increasing the quantity at the time of setting and a DOWN key 50b for decreasing the quantity, and indicates that the setting key 50 is effective when the LED lamp 55 in the setting key 50 is lit. When it is off, it indicates that it is invalid.

For example, a case where the thermal power is adjusted with the setting key 50 will be described. First, press the medium heat key 49c to set the heat power to "7". After that, when the UP key 50a of the setting key 50 is pressed twice, the number indicating the thermal power displayed on the upper surface display unit 10 described later is changed from "7" to "8" and from "8" to "9". , High heat "9" is set. Along with this, the LED lamp 54 of the thermal power key 49 also turns off the LED lamp of the medium heat key 49c and turns on the LED lamp of the high heat key 49d. The same applies to other settings. For example, the operation of the setting key 50 after the timer key 51 is pressed is for setting the time.

Next, the rear 9c of the upper surface operation unit will be described. The main cooking of 6c after the placement part is heat retention and stew. The reason for this is as described above. Therefore, the thermal power of 13c after the heating coil is also designed to be smaller than the thermal power of other heating coils. For this reason, it is sufficient to use low heat, low heat, and medium heat as the heat power notation, and even if the setting key 62 is a cyclic type, it will return to the original state by pressing it up to 3 times, so each heat power like the two heating coils 25a and 25b in the foreground There is no thermal power setting key corresponding to. As a result, the key installation space can be secured. The contents of the independent automatic cooking menu are limited to stewing and heat retention because the design is such that the heating power is limited.

A mode in which the left 6b of the mounting portion and the 6c after the mounting portion are used at the same time will be described. Menu keys 52, 60, and 64 on the right side of the upper surface operation unit 9 can select menus that can be used by simultaneous energization by pressing the simultaneous menu keys 64b provided separately.

It should be noted that the menu to be used by simultaneous energization may be selected by pressing any of the menu keys 52, 60, and 64 without providing individual menus, or an operation button may be provided on the operation panel 5. In addition, a menu may be provided in which the three mounting portions 6 are used at the same time.

With reference to FIG. 5, the plurality of keys arranged on the upper surface operation unit 9 are arranged in a line in the width direction of the main body 2 on the front 14a of the frame. Then, from the right side toward the main body 2, the upper surface operation unit right 9a, the upper surface operation unit rear 9c, and the upper surface operation unit left 9b are arranged in this order.

Next, a display that reflects the result of the above operation will be described. The contents corresponding to the key operations of the upper surface operation unit 9 are displayed on the upper surface display unit 10. The contents to be displayed include a thermal power display set by the upper surface operation unit 9, a time display for timer cooking, a set oil temperature display for fried food, and the like. The upper surface display portion 10 is arranged on the front side of the plate 3 placed on the upper surface of the main body 2 and on the back side of the plate 3. Therefore, since the display is viewed through the plate 3, the display portion of the upper surface display unit 10 is processed so that the display content can be viewed through the plate 3. In addition, the color of the backlight of the display unit is set so that the set thermal power can be easily understood in the image. In this embodiment, low heat and low heat are displayed in green, medium heat is displayed in orange, and high heat and high power are displayed in red.

In the above embodiment, each upper surface operation unit 9 is divided into a top surface display unit right 10a, a top surface display unit rear 10c, and a top surface display unit left 10b, and the arrangement of each top surface display unit is a straight line along the frame front 14a. However, in order to improve visibility, the upper surface display portion rear 10c may be arranged closer to the mounting portion rear 6c side than the upper surface display portion right 10a and the upper surface display portion left 10b.

The upper surface operation unit 9 and the upper surface display unit 10 are provided for each of the mounting portions 6 on the plate 3, and when the line of sight is linearly moved to the front side from each mounting portion 6, each of them is substantially on the straight line. The upper surface operation unit 9 and the upper surface display unit 10 corresponding to the mounting unit 6 are arranged so as to exist, and the upper surface operation unit 9 is arranged so as to be located closer to the cook than the upper surface display unit 10. ..

Next, the control will be briefly described with reference to FIG. The operation / display unit 75 includes a top surface operation unit 9, a top surface display unit 10, and a front surface operation unit 12 described so far. The menu, thermal power information, cooking start / off information, etc. input by the operation unit of the operation / display unit 75 are sent as an input signal 80 to the control means 74 described later, and the information recognized by the control means 74, the progress of cooking, etc. The processing status of is sent to the operation / display unit 75 as a display signal 79, and is displayed on the upper surface display unit 10.

The control means 74 controls the heating unit based on the contents set by the operation / display unit 75 and a program such as automatic cooking incorporated in advance. Based on the set contents, cooking start, stop, and heating power setting information is sent to the inverter control means 73 or the heater control means 82, which will be described later, via the control signal 78 (control signal 85). Then, the temperature information is received by receiving the control signal 78 (control signal 85) on which the temperature information is carried from the temperature detecting element 21 (not shown in the temperature detecting means 38) provided in the heating unit for detecting the temperature. In addition, although not shown in the block diagram, the blower fan 20 is also controlled to operate the blower fan during cooking.

The inverter control means 73 monitors and corrects the setting of electric power to the heating coil 13, the start and stop of energization, and the power consumption of the heating coil 13 based on the instruction of the control means 74. Then, the inverter means 72 is controlled (described later) by sending an inverter control signal 76 to the inverter means 72. Regarding monitoring and correcting the power consumption of the heating coil 13, the power consumption is calculated from the input current and the input voltage of each heating coil 13 sent by the detection signal 77 from the inverter means 72 described later, and the thermal power is a set value. The inverter means 72, which will be described later, is controlled by the inverter control signal 76 so as to be.

The inverter means 72 is a means for supplying electric power to the heating coil 13, and supplies electric power to the heating coil 13 based on an instruction from the inverter control means 73. The inverter 72 is provided in each heating coil 13 like the inverter control means 73, and an inverter right 72a, an inverter left 72b, and an inverter rear 72c are provided. Then, the input voltage and the input current of each heating coil 13 are detected, put on each detection signal 77, and sent to the inverter control means 73.

This embodiment has the above configuration, and the operation thereof will be described next.

For example, the description will be made in a state where the user is trying to make fried noodles using the grill pan 42. When the grill pan 42 (FIG. 8) is placed on the grill pan area a40 (FIG. 7) on the left 6b of the mounting portion and 6c after the mounting portion and the simultaneous menu key 64b of the simultaneous menu is pressed, the top display portion left 10b and the top display portion are displayed. The rear 10c lights up, and an automatic menu such as "fish roasting" and a manual menu for setting the heating power of the mounting portion left 6b and the rear 6c of the mounting portion are displayed. Press the setting keys 58a, 58b, 62a, 62b to manually set the left 6b of the mounting portion to high heating power, set the rear 6c of the mounting portion to medium heating power, and press the off / start 56 or 61 to start cooking. At first, in order to heat the grill pan 42, the temperature is energized to a set temperature with high heat, and when the temperature is warmed, the temperature is kept constant to notify the start of cooking. In cooking, meat and vegetables are fried on the front side of the grill pan 42, and at the same time, yakisoba noodles are baked on the back side. The temperature of the grill pan 42 is detected by using the infrared sensor S provided on the left 13b of the heating coil and the temperature detecting element 21c provided on the 13c after the heating coil, and the heating power is automatically adjusted. Time can be shortened by rapid warming and simultaneous cooking. Further, when the noodles in the back of the grill pan 42 are moved to the front side of the grill pan 42 having the heating coil left 13b and started to be mixed with meat and vegetables, 13c after the heating coil is in an empty-baked state and 21c after the temperature detection element is 15 seconds. Set a specific value T of the temperature rise value that rises by 20 ° C, and if the rise value of the detected temperature is higher than the specific value T, it is judged as dry burning, and the heating power is automatically limited or the energization is stopped. To do. Further, by using the infrared sensor S, the temperature of the grill pan 42 can be detected in detail, and cooking can be performed at a stable temperature.

In this example, yakisoba was raised, but fish grilling is also possible. In the case of grilled fish, the position where the fish is placed can be known by observing the temperature unevenness of the temperature detecting element 21, and the thermal power can be finely controlled by using the infrared sensor S. Therefore, the timing of turning over is also notified by voice, and when turning over, it is possible to start burning the back side due to the temperature drop of the infrared sensor S and the temperature detection element 21.

Next, when the grill pan 42 is the grill pan area b41 (FIG. 7) over all three of the mounting portions 6, the three mounting portions 6 are set to different heating powers, and the steak is cooked at the same time with different baking degrees. Is possible. In addition, since the rear 6c of the mounting portion is provided behind the left 6b of the mounting portion, the rear of the right 6a of the mounting portion has only heat conduction and can be used as a place to keep warm, when making okonomiyaki or pancakes. You can prevent the first cooked food from cooling.

The grill pan 42 is made of a material that can be heated by induction heating, has a flat bottom surface as shown in FIG. 8, and has a size that allows it to be placed on a plurality of mounting portions 6 such as the grill pan area a40 and the grill pan area b42. Is. The bottom surface of the grill pan 42 does not necessarily completely cover the two mounting portions 6 in the case of the grill pan area a40 and the three mounting portions 6 in the case of the grill pan area b41. Further, the infrared sensor S detects infrared rays emitted from the bottom surface of the grill pan 42 through the infrared sensor window 26. The temperature detecting element 21 uses a thermistor in the above embodiment.

As described above, according to the present embodiment, the grill pan 42 is used on the plate 3 and the plurality of heating coils 13 are individually controlled at the same time to eliminate uneven heating or to make a temperature difference depending on the position of the grill pan 42. Therefore, it is possible to provide an induction heating cooker capable of realizing various cooking methods.

2 ... Main body, 3 ... Plate, 13 ... Heating coil, 13a ... Heating coil right, 13b ... Heating coil left, 13c ... After heating coil, 42 ... Grill pan, 21 ... temperature detection element, 72 ... inverter means, 74 ... control means, S ... infrared sensor

Claims (2)

A plate on which the object to be heated is placed is arranged on the upper surface of the main body, and a plurality of heating coils, an infrared sensor and a temperature detection element for detecting the temperature of the object to be heated, and the above-mentioned In an induction heating cooker including an inverter means for supplying electric power to a heating coil and a control means for controlling the inverter means based on the detection temperature of the infrared sensor and the temperature detection element.
The control means can control a plurality of the plurality of heating coils at the same time, determines the increase value of the detection temperature of the infrared sensor and the temperature detection element, and sets the increase value of the detection temperature to a specific value or more. When indicated, stop or reduce the power supply to the heating coil.
The plurality of heating coils have a heating coil right, a heating coil left, and a heating coil rear, and after the heating coil, the heating coil right or the heating coil left rear is arranged.
The container in which the object to be heated is placed is placed on the right side of the heating coil, the left side of the heating coil, the rear part of the heating coil and the rear part of the heating coil, and the left side of the heating coil or the right side of the heating coil. An induction heating cooker, characterized in that it is possible. When the rear of the heating coil is behind the right side of the heating coil and the container for the object to be heated is placed after the heating coil and above the right side of the heating coil, the simultaneous menu key of the upper surface operation unit is pressed. , The back of the top display and the right of the top display are displayed.
When the rear of the heating coil is behind the left side of the heating coil and the container for the object to be heated is placed after the heating coil and above the left side of the heating coil, the simultaneous menu key of the upper surface operation unit is pressed. The induction heating cooker according to claim 1, wherein the rear of the upper surface display portion and the left side of the upper surface display portion are displayed.

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