JP5022784B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker.

  Conventionally, the majority of heating cookers that heat pots are cooking cookers that use a flame such as a gas range as a heat source.

  In recent years, the trend of so-called all-electric homes, in which all home appliances are electrified, is becoming prominent. As part of this, an electromagnetic induction heating cooker that uses the eddy current of the pot to heat the pot itself has been reviewed.

  An electromagnetic induction heating cooker is a cooker that excels in electronic temperature control, automatic cooking, and the like as compared with a conventional cooking device such as a gas range.

For example, as shown in Patent Document 1,
When the frying pan is preheated for cooking the stir-fried food, it is possible to confirm on the display means the timing when the preheating is finished and the ingredients are added to start cooking.

  ・ When the pan starts to be heated, the overshoot of the pan temperature can be kept low.

  ・ While pre-heating an empty pan, etc., the control means controls the heating means with the maximum heat power selectable to prevent the pan from being thermally deformed due to the high control temperature and too high heating power. .

・ When the temperature of the pan reaches the control temperature, the restriction of the set heating power can be canceled and the maximum heating power can be selected as the equipment.
A cooking device is shown that is very easy for the user to use and has a care for the pot used.

JP 2006-120552 A

  However, in the above conventional technology, for example, the frying pan was preheated to make the stir-fried food, and the ingredients were prepared to stir the ingredients after the preheating was completed, but the ingredients could not be prepared until the preheating was completed. In such a case, the heating of the frying pan is continued until the food is ready, and there is a problem that power is wasted.

  In addition, when the pan is preheated and the ingredients are fried after completion of preheating, the heating power is automatically suppressed to prevent thermal deformation of the pan during preheating. For this reason, when the food is fried after preheating is completed and the temperature is appropriate, it is necessary to reset the set power to “strong”. However, if you put ingredients in a frying pan and are crazy about cooking and forget to set the heating power to `` strong '', the heating power is weak, so the frying temperature is deprived at once and the frying temperature is lowered and fried well There was a problem that things could not be made.

  Furthermore, if the cooker was not near the cooker during preheating, the frying pan would be heated for a long time, resulting in wasted power and a problem with safety.

The present invention has been made in order to solve the above-described problems. A plate provided on the upper surface of the main body, a plurality of heating means for heating the pan placed on the plate, and the temperature of the pan are detected. A temperature detecting element for determining, a menu setting means for determining the temperature of the pan according to cooking, a thermal power setting means for setting a heating power for heating the pan, and the menu setting means and the thermal power setting means Display means for displaying the state and the like, and control means for controlling the output of the heating means in a range of 100 W to 3 kW according to the temperature of the pan detected by the temperature detection element, and the menu setting means The heating means is controlled by the control means so that the temperature of the pan becomes a temperature corresponding to the selected menu, and the temperature of the pan corresponds to the menu. When the temperature is reached, it is displayed on the display means that the preheating of the pan has been completed, and after reaching an appropriate temperature, the heating is controlled with a heating power of 800 W or less that maintains the temperature of the pan at an appropriate temperature, Is input, the pan is heated with the input thermal power, and after the preheating is finished, when there is no input from the thermal power setting means within a predetermined time, heating by the thermal power of 800 W or less is stopped , and further, the thermal power setting is performed. A lamp that is turned on in accordance with the setting of the means is provided in the vicinity of the heating power setting means, and after preheating, the lamp is input to the heating power setting means so as to prompt the input from the heating power setting means. It was made to flash and remind .

  According to the present invention, after the preheating is completed, heating is performed with the minimum thermal power until the thermal power is input from the thermal power setting means by the user, so that waste of electric power can be minimized.

  In addition, since the state of heating with the minimum heating power after the end of preheating ends in a certain time, it is safe and the wasteful use of electric power can be minimized even if the pot is forgotten to be heated.

  Furthermore, after the preheating is finished, the prompting action is performed until the input of the thermal power setting means is made on the display means so as to prompt the input from the thermal power setting means, so that the input of the thermal power setting means can be prevented from being forgotten.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing an embodiment of the operation of the induction heating cooker of the present invention.

  Reference numeral 26 denotes a metallic pan of the object to be heated. Reference numeral 13 denotes a heating coil for heating the pan, and the winding of the heating coil 13 employs a litz wire to suppress the skin effect. 18 is an inverter circuit 18 in which a voltage of several tens of kHz and several hundreds V is applied to the heating coil 13 in order to heat the pan 26, and the heating coil 13 and the inverter circuit 18 are collectively referred to as a heating means 23. Here, an induction heating method will be described as an example of the heating means 23, but the present invention is not limited to the induction heating method. Reference numeral 20 denotes a temperature detection element for detecting the temperature of the pan 26, and a thermistor whose resistance value changes depending on the detected temperature, an infrared sensor that detects the infrared rays generated by the pan 26, and the like are used. A menu 34 is used to select a menu to be used from a plurality of automatic menus incorporated in advance by the menu setting means. Reference numeral 31 denotes a thermal power setting means which allows the user to adjust the thermal power according to his / her preference. Reference numeral 17 denotes a display means for displaying a menu selected by the menu setting means 34, a display of the progress of automatic cooking, and the setting contents of the heating power setting means 31. Reference numeral 19 denotes a control means for controlling the heating power, the heating time, and the temperature of the pan 26 based on a procedure or rule in which the menu input by the menu setting means 34 is incorporated in advance. Based on the detected temperature, the heating means 23 is controlled to heat the pan 26, the heating means 23 is controlled to heat the pan 26 with the thermal power input from the thermal power setting means 31, or the menu setting means 34 is input. The displayed menu, the progress of cooking, and the contents input by the heating power setting means 31 are displayed on the display means 17.

  2 to 4 show an embodiment of an induction heating cooker incorporating the system of the present invention.

  FIG. 2 is a perspective view of the built-in induction heating cooker stored in the system kitchen. Drawing 3 is an explanatory view showing the upper surface of an induction heating cooking appliance. FIG. 4 is an explanatory view with the plate of the induction heating cooker removed.

  In addition, the present Example is not limited to the built-in type that fits in the kitchen, but may be a stationary heating cooker that is placed in the kitchen.

  The main body 2 of the heating cooker is incorporated by being dropped from the upper surface of the system kitchen 1 and installed. After installation, a roaster (grill) 4 and an operation panel 5 described later can be operated from the front surface of the system kitchen 1.

  The pot for cooking is placed on a plate 3 made of heat-resistant glass or the like disposed on the upper surface of the main body 2.

  The pan can be cooked by being placed on the placement portion 6 drawn on the plate 3. The placement unit 6 has a placement unit right 6a and a placement unit left 6b arranged in front of the upper surface of the plate 3 on the upper surface of the main body 2, and is placed in the back (center rear) between the placement units 6a and 6b. The center 6c is arranged. And the heating coil 13 for heating a pan under each mounting part 6 on both sides of the plate 3 is each installed.

  The placement center 6c is a place where it is difficult to reach the position of the cook. For this reason, when the cooking pan is placed on the placement unit right 6a and the placement unit left 6b in the foreground, if the hand is extended to the placement unit center 6c, the placement unit right 6a and the placement unit left 6b It is difficult to perform cooking by moving the hand at the placing portion center 6c due to steam generated during cooking from the cooking pan placed. Accordingly, the type of cooking performed at the placement portion center 6c is suitable for cooking that does not require the chef to move much, mainly cooking such as stew or heat retention. In addition, since the heating power is low and the maximum power consumption is limited, the heating power of the heating coil 13c installed in the mounting portion center 6c is transferred to the mounting portion right 6a and the mounting portion left 6b. It is set to be weaker than the heating coil right 13a and the heating coil left 13b that are installed correspondingly and to reduce power consumption.

  A heating coil 13 and an inverter board, 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 air sucked through the air inlet 7 cools the heating coil 13 and the inverter board that generate heat inside the main body 2, and then is discharged out of the main body 2 from the exhaust port 8 as shown by the flow 16 of the cooling air. Further, waste heat of the roaster 4 described later is also discharged from the exhaust port 8 at the same time.

  The roaster 4 is for baking fish, pizza, etc., and is arranged on the left or right side of the front surface of the main body 2. In the present embodiment, it is arranged on the left side toward the front surface of the main body 2. Further, since it is not dedicated to grilled fish, the roaster 4 may be called a grill or an oven.

  Next, the heating coil unit 25 will be described. The heating coil unit 25 includes a heating coil 13, a coil base 24, and ferrite (not shown). The heating coil unit 25 is disposed below the plate 3 of each placement unit 6 so that a certain gap is opened between the plate 3 and the heating coil 13. Cooling air is passed through this gap to protect the heating coil 13 and the like from the heating coil 13 that generates heat and the heat from the heated pan.

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

  Each heating coil unit 25 is disposed below each placement unit 6, the heating coil unit right 25 a is below the placement unit right 6 a, and the heating coil unit left 25 b is below the placement unit left 6 b, A heating coil unit center 25c is provided below the placement unit center 6c.

  Temperature detection of the pan such as automatic cooking is performed by a temperature detection element A21 and a temperature detection element B22 which are temperature detection elements 20 installed in the heating coil unit 25. The temperature detecting element 20 is pressed against the plate 3 to detect the temperature of the pan bottom, and indirectly detects the temperature of the pan bottom via the plate 3. The temperature detection element A21 is installed between the coils of the respective heating coils 13 on the heating coil unit right 25a and the heating coil unit left 25b, and the temperature detection element B22 is arranged on the heating coil unit right 25a, the heating coil unit left 25b, and the heating coil unit center 25c. Are installed in the center of each of the heating coils 13. Some pans have a floating bottom center, and therefore, two temperature detecting elements 20 are provided on the heating coil unit right 25a and the heating coil unit left 25b having a large heating power.

  Circuits such as an inverter circuit 18 for exciting the heating coil 13 and a control means 19 for controlling the output to the heating means 23 in accordance with the temperature detected by the temperature detection element 20 are accommodated in the substrate case 15.

  The upper surface operation unit 9 inputs the heating power of the heating coil right 13a on the placement unit right 6a side and the upper operation unit left 9b for inputting the heating power of the heating coil left 13b on the mounting unit left 6b side. And an upper surface operation portion center 9c for inputting the heating power of the heating coil 13c on the placement portion center 6c side.

  The upper surface display unit 10 is arranged as an upper surface display unit right 10a, an upper surface display unit left 10b, and an upper surface display unit center 10c corresponding to each operation unit of the upper surface operation unit 9, and displays the contents input by each operation unit.

  Next, FIG. 5 is an explanatory diagram showing the upper surface operation unit right 9a and the upper surface display unit right 10a. The display means 17, the thermal power setting means 31, and the menu setting means 34 will be described in detail using the upper surface operation unit right 9a and the upper surface display unit right 10a.

  Since the contents related to the present invention are the same for the upper surface operation unit right 9a and the upper surface display unit right 10a, the upper surface operation unit left 9b and the upper surface display unit left 10b, the upper surface operation unit center 9c and the upper surface display unit center 10c, the upper surface operation unit left 9b and the upper surface The description of the display unit left 10b, the upper surface operation unit center 9c, and the upper surface display unit center 10c side is omitted.

  The upper surface display portion right 10a is divided into a display 41a and a display 41b. The display 41a displays the thermal power input by the thermal power setting means 31, the menu input by the menu setting means 34, and the like. The display 41b is “pre-heating” so that when the temperature of the pan or frying pan reaches an appropriate temperature by using the menu input by the menu setting means 34, the temperature of the pan or frying pan reaches an appropriate temperature. Display “appropriate temperature”.

  The lamps 35 to 40 are composed of LEDs or the like, and the lamp 35 is lit when a turn-off / start key 30 described later is pressed and a heating start is input. The lamps 36 to 39 are lit by the thermal power set by the thermal power setting means 31 described later. Further, the lamps 36 to 39 are simultaneously flashed and notified to prompt the user to set the heating power by automatic cooking which will be described later. The lamp 40 blinks and notifies when the thermal power adjusting means is effective.

  Here, the display 41a, the display 41b, and the lamps 35 to 40 are used as the display means 17.

  The thermal power that can be set by the thermal power setting means 31 is divided into four stages: a “hot fire” key 31a, a “low fire” key 31b, a “medium fire” key 31c, and a “high fire” key 31d, and the necessary thermal power can be input in one operation. In this way, keys are provided individually according to the thermal power. The standard of each thermal power is, for example, when a maximum of 12 stages of thermal power is provided, the relationship between each thermal power and power consumption is equivalent to 100W for "1" stage, equivalent to 200W for "2" stage, 300W for "3" stage, “4” stage is 400 W, “5” stage is 500 W, “6” stage is 800 W, “7” stage is 1.1 kW, “8” stage is 1.4 kW, “9” stage is 1.6 kW, “10” "Is 2 kW," 11 "is 2.5 kW, and" 12 "is 3 kW. The numbers at each stage are the numbers displayed on the display 41a as a guide for the thermal power. In addition, the relationship between the four-stage thermal power display and the 12-stage display is “1” for “slow fire”, “2”, “3”, “4”, “5” for “low fire”, and “6” for “medium fire”. ”,“ 7 ”,“ 8 ”,“ strong fire ”are“ 9 ”,“ 10 ”, which are not provided in the keys of the thermal power setting means 31, but“ 11 ”,“ 12 ”are assigned as“ high power ”. . The thermal power setting means 31 can input directly to the representative thermal power of the four stages of thermal power, the “slow fire” key 31a is “1”, the “low heat” key 31b is “4”, and the “medium fire” key 31c is “7”. ”,“ High fire ”key 31 d can input“ 10 ”firepower.

  When the thermal power adjusting means 32 inputs thermal power that cannot be input by the thermal power setting means 31, for example, thermal power "9", first, the thermal power is input to "7" by the "medium fire" key 31c, and then the thermal power adjustment UP key 32b. When the key is pressed twice, the number indicating the heating power displayed on the display 41a is changed from “7” to “8” and from “8” to “9”, indicating that the heating power is changed to “9”. .

  Incidentally, the thermal power can be lowered from “9” to “8” by pressing the thermal power adjustment DOWN key 32a next time.

  Reference numeral 33 denotes a timer key for selecting a heating time mainly when performing timer cooking such as stew or heat retention.

  The menu setting means 34 is for selecting cooked rice, fried food, boiling water, fried food, etc. for automatic cooking. When the menu setting means 34 is pressed, the menu is displayed on the display 41a. The menu is switched and displayed. This selects the menu to be used.

  Reference numeral 48 denotes a cut / start key for starting and stopping cooking.

  The present embodiment has the above-described configuration. Next, the operation will be described with reference to FIGS. 6 to 8 are display examples of the upper surface operation unit and the upper surface display unit during automatic cooking. 9 and 10 are diagrams showing the relationship between the detected temperature at the bottom of the pan, the thermal power, and the operation.

  For example, when a user cooks a fried vegetable, the user places a frying pan on the mounting portion used for heating, and pushes back the menu setting means 34 while viewing the display 41a, and selects “stir fry” from the menu. To do. When the menu is selected, the lamp 35 blinks to notify that the OFF / START key 30 has been activated. When the OFF / START key 30 is pressed, cooking is started, and the lamp 35 is turned on from flashing to indicate that cooking is in progress (preheating). Then, a display indicating that the frying pan is currently being preheated lights up “in preheating” on the display means 41b. The state of the display 41 and the lamps 35 to 40 at this time is shown in FIG.

  Next, when heating of the frying pan proceeds and the detected temperature at the bottom of the frying pan approaches an appropriate temperature range, the heating power is reduced to reduce the overshoot of the frying pan temperature (FIGS. 9 (a) and 10 (a)). When the detection temperature of the frying pan reaches the appropriate temperature range, the user is notified of the appropriate temperature. Therefore, the display of “Preheating” on the display 41b is redisplayed as “appropriate temperature”, and the fact that the appropriate temperature has been reached is also notified by a buzzer or voice.

  Then, the ingredients to be fried are put in a frying pan, and the four lamps of the lamp 36 to the lamp 39 of the display means 17 are blinked simultaneously so that the heating power is inputted by the heating power setting means 31 and a prompting action is performed. The lamp 35 is turned off.

  The heating power after the appropriate temperature (FIG. 9B, FIG. 10B) is a state where heating is controlled with the minimum heating power in order to maintain the temperature of the frying pan. The heating power is controlled in accordance with the detected temperature of the frying pan between the stages “6” to “6”.

  If no thermal power is input from the thermal power setting means 31 as it is, the heating means 23 is automatically energized within a certain time, for example, 3 minutes, and the heating of the frying pan is stopped (FIG. 10 (c)). In addition, when cooking is carried out by putting ingredients in a frying pan, if the user is absorbed in cooking and forgets to input the thermal power from the thermal power setting means 31, the thermal power after the appropriate temperature is controlled by heating with the minimum thermal power. Because it is in a state, you can't cook well.

  The state of the display 41 and the lamps 35 to 40 at this time is shown in FIG.

  Next, when “high fire” is input by the heating power setting means 31, the lamp 39 is turned on and the lamp 35 blinks to instruct to input the off / start key. At this time, the “appropriate temperature” display displayed on the display 41b is extinguished, and the thermal power stage “10” input on the display 41a is displayed. When turning off / start is input, the lamp 35 is turned on, and the heating of the frying pan is started at a heating power of 2 kW of the stage “10”. Thereafter, the ingredients are put in a frying pan and cooking is started. In the description, the food material is input after the thermal power is input by the thermal power setting unit 31, but the thermal power may be input by the thermal power setting unit 31 after the food material is input first. However, since the heating power at that time is a state in which heating is controlled with the minimum heating power for maintaining the temperature of the frying pan, the temperature of the frying pan is drastically lowered when ingredients are put therein. Ideally, the ingredients can be fried better if the input of the thermal power is completed and the thermal power of the frying pan is set to a desired setting and then the ingredients are added.

  The state of the display 41 and the lamps 35 to 40 at this time is shown in FIG.

  FIG. 9 shows the relationship between the passage of heating time, the detected temperature at the bottom of the pan, the thermal power, and the thermal power after the thermal power is set along the above flow.

  In addition, when the preheating is over and the ingredients are not prepared by the proper temperature, or when the ingredients are put into the frying pan after the optimum temperature and the cooking power is absorbed and you forget to input the thermal power from the thermal power setting means 31, Heating is controlled with a minimum of heat so as to maintain the temperature at an appropriate temperature, and heating of the frying pan is finished after a certain time. FIG. 10 shows the relationship between the elapsed heating time, the detected temperature at the bottom of the pan, and the heating power.

  The frying process has been described above. In all the processes, the temperature detecting element 20 always detects the temperature of the frying pan in addition to the cooking control temperature, and the control means 19 prevents smoke, fire, and frying from being deformed at a high temperature due to abnormal heating. The temperature is controlled by this so that it is fully safe.

  According to the present invention, after the preheating is completed, heating is performed with the minimum thermal power until the thermal power is input from the thermal power setting means by the user, so that waste of electric power can be minimized.

  In addition, since the state of heating with the minimum heating power after the end of preheating ends in a certain time, it is safe and the wasteful use of electric power can be minimized even if the pot is forgotten to be heated.

  Furthermore, after the preheating is finished, the prompting action is performed until the input of the thermal power setting means is made on the display means so as to prompt the input from the thermal power setting means, so that the input of the thermal power setting means can be prevented from being forgotten.

It is a block diagram which shows operation | movement of an induction heating cooking appliance. It is a perspective view of the state which stored the built-in type induction heating cooking appliance in the system kitchen. It is explanatory drawing which shows the upper surface of an induction heating cooking appliance. It is explanatory drawing which removed the plate of the induction heating cooking appliance. It is explanatory drawing which shows the upper surface operation part right and the upper surface display part right. It is explanatory drawing which shows the state of the upper surface operation part right and the upper surface display part right during preheating with a stir-fried thing. It is explanatory drawing which shows the state of the upper surface operation part right of a fried food, and the upper surface display part right. It is explanatory drawing which shows the state of the upper surface operation part right and the upper surface display part right in the middle of frying. It is explanatory drawing which showed the relationship between the detection temperature of a pan bottom, and a thermal power. It is explanatory drawing which showed the relationship between the detection temperature of a pan bottom, and a thermal power.

Explanation of symbols

3 Plate 9 Upper surface operation unit 10 Upper surface display unit 13 Heating coil 19 Control unit 20 Temperature detection element 31 Thermal power setting unit 34 Menu setting unit

Claims (2)

A plate provided on the upper surface of the main body;
A plurality of heating means for heating the pan placed on the plate;
A temperature sensing element for detecting the temperature of the pan;
Menu setting means for determining the temperature of the pan according to cooking;
Thermal power setting means for setting the thermal power for heating the pan;
Display means for displaying the state determined by the menu setting means and the thermal power setting means;
Control means for controlling the output of the heating means in the range of 100 W to 3 kW according to the temperature of the pan detected by the temperature detection element;
The menu is selected by the menu setting means, the heating means is controlled by the control means so that the temperature of the pan becomes a temperature corresponding to the selected menu, and the temperature of the pan becomes a temperature corresponding to the menu. Then, it is displayed on the display means that the preheating of the pan is completed, and after reaching the appropriate temperature, the heating is controlled with a heating power of 800 W or less which maintains the temperature of the pan at the appropriate temperature, and the heating power is input from the heating power setting means. heating said pan at thermal you type is, after the preheating completion, the if there is no input from the thermal power setting means stops the heating by 800W following thermal maintaining the temperature of the pot at an appropriate temperature within a predetermined time ,
Furthermore, a lamp that is turned on according to the setting of the thermal power setting means is provided in the vicinity of the thermal power setting means,
An induction heating cooker characterized in that after the preheating is finished, the lamp is blinked until the input of the heating power setting means is input so as to prompt the input from the heating power setting means . The induction heating cooker according to claim 1,
The display means includes first display means and second display means,
The first display means displays the thermal power input by the thermal power setting means or the menu input by the menu setting means,
The induction heating cooker characterized in that the second display means displays whether preheating or proper temperature is displayed.

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