JP2008130399A - Induction cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To optionally set priority by a user, when using two induction heating coils. <P>SOLUTION: The induction cooker is provided with the two induction heating coils 6a, 6b arranged closer to the front surface of the body, with one induction heating coil 6c arranged closer to a back between these induction heating coils, an electric heater 702 for heating a grill part arranged in the main body, and a control part 713 for controlling the output power of inverter circuits 703, 704, 705 for supplying power to the electric heater 702 or for driving the induction heating coil. The induction cooker is provided with a priority setting means, enabling the user to set the priority with respect to the two induction heating coils 6a, 6b. The control part 713 gives priority on output power of the induction heating coil of higher priority set by the priority setting means so that the total power lies within the rated power of equipment, when power is supplied to the two induction heating coils 6a, 6b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an induction heating cooker including a plurality of heating units.

  In recent years, the demand for induction heating cookers has increased. The induction heating unit of the induction heating cooker has high thermal efficiency, can obtain a thermal power equivalent to that of a gas stove, does not emit a flame, has a function such as a timer forgetting to turn it off, is safe, and the top surface is flat and cleaned As an alternative to the gas table, an induction heating cooker that combines a grill part for grilling fish and an induction heating part with two or more induction heating coils for heating a pan, etc. Demand is growing.

  In such a conventional induction heating cooker, it is desirable in terms of cooking performance that each heating part (grill part and induction heating part) can stably obtain as high output as possible, but the power supply situation (power capacity, Due to restrictions on wiring capacity, types of outlets, etc., and legal restrictions, the product is in a range where the maximum total power of the entire device falls within a predetermined rated power value. For this reason, it can be pulled out to the front of the main body by an induction heating part by induction heating coils provided on the left and right sides of the front side of the top plate, a heating part by a radial heater (electric heater) provided at the center rear side of the top plate When the heating part by the electric heater which heats the provided grill part is provided and the heating part by the electric heater of the radiant heater or the grill part is in operation, the rated power of the device−electric heater heating power = output of the induction heating part (power) The output that can be assigned to the induction heating unit is determined, the total power of the device is kept within a predetermined value, and the induction heating unit within the rated power of the device is set to output within the allowable power consumption range. It is possible. Therefore, the induction heating unit can set the output in a wide range in the range of 0 to 100% with respect to the permissible range, and can be cooked at a high output in a short time during cooking. The cooking finish by the output with high heat exchange efficiency, which is a feature of heating, can be realized (see, for example, Patent Document 1).

JP 2003-347026 A

  However, in the above-described prior art, when cooking in a heating unit that also includes two induction heating cookers on the front left and right, it must be used within the rated power, so the heating of both of the two induction heating cookers is weakened. There is a possibility that. The user needs to cook while maintaining high heat in one induction heating cooker. At that time, it is easier to cook if the user maintains the high heat and sets the user's dominant arm side.

  Therefore, an object of the present invention is to provide an induction heating cooker in which a user can arbitrarily set priorities when using two induction heating coils arranged on the front surface of a main body.

In order to solve the above-described problems, an induction heating cooker according to the present invention includes two induction heating coils disposed near the front surface of the main body, and one induction heating coil disposed near the back of the induction heating coils. An inverter circuit for driving these induction heating coils, a top plate for covering the upper surface of the induction heating coil, on which a cooking pan is placed, an electric heater for heating the grill portion disposed in the main body, and the electric heater In an induction overheating cooker equipped with a control unit for controlling the power supply or the output power of the inverter circuit,
When the user has priority setting means capable of setting priority for the two induction heating coils, and the control unit supplies power to the two induction heating coils, the total power is The output power of the induction heating coil with the higher priority set by the priority setting means is prioritized so as to be within the rated power of the device.

  According to the present invention, a specific induction heating coil can be preferentially selected from among a plurality of induction heating coils, which is very convenient.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 10 show an embodiment of the present invention. FIG. 1 is an external perspective view of a built-in induction heating cooker incorporated in a system kitchen. 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.

  Drawing 2 is an explanatory view showing the upper surface of an induction heating cooking appliance. In the figure, the main body 1 of the induction heating cooker is provided under the top plate 2. The top plate 2 is made of crystallized glass having high heat resistance. A cooking pan such as a cooking pan or the like to be heated is placed on the top plate 2.

  The top plate frame 3 covers the periphery of the top plate 2. A sealing material (not shown) is filled between the top plate 2 and fixed around the top plate 2. Even if liquid spills on the top plate 2 due to the sealing material, it has a watertight structure that prevents water from leaking inside the main body 1.

  The top plate frame 3 is also fixed to the main body 1. When attaching the main body 1 to the system kitchen 10, the main body 1 is suspended from the top plate frame 3 and installed.

  An intake portion 1 a that opens in the rear frame portion of the top plate frame 3 communicates with an intake / exhaust passage provided in the rear portion of the main body 1, and controls a control unit (not shown) in the main body 1 and the induction heating coil 6. Intake cooling air.

  Similarly to the air intake portion 1a, the exhaust portion 1b that opens to the rear frame portion of the top plate frame 3 removes air that has cooled the control unit (not shown), the induction heating coil 6 and the like, and smoke exhausted from the grill portion 5. Exhaust.

  The plurality of pan position display parts 4 a, 4 b, 4 c provided on the top surface of the top plate 2 are display parts provided at positions directly above the induction heating coil 6 disposed at the bottom of the top plate 2.

  The plurality of induction heating coils 6 are provided substantially horizontally below the top plate 2 and above the main body 1. The induction heating coil 6a is located on the front left side of the top plate 2 near the front surface of the main body 1, and the induction heating coil 6b is located on the right side of the top plate 2 near the front surface. The induction heating coil 6a and the induction heating coil 6b An induction heating coil 6c is arranged on the central rear side of the top plate 2 that is in the middle of the space. And the cooking pot etc. which were mounted in the top plate 2 are induction-heated.

  The pan position display unit 4a is provided corresponding to the induction heating coil 6a disposed on the left side before the top plate 2, and the pan position display unit 4b is provided corresponding to the induction heating coil 6b disposed on the right side near the top plate 2. The pan position display portion 4c is provided corresponding to the induction heating coil 6c disposed on the center rear side of the top plate 2.

  The induction heating coils 6a, 6b on the front left and right sides of the top plate 2 are for cooking that requires a relatively large output such as fried foods and fried foods. In this embodiment, the heating power (thermal power) has a maximum power consumption of 3.0 kW.

  In addition, the induction heating coil 6c arranged on the center rear side of the top plate 2 does not require much work during cooking such as heat insulation, stewed cooking, and rice cooking, and is in comparison with the induction heating coils 6a and 6b on the front left and right sides. It is for cooking with relatively low output. In this embodiment, the induction heating coil 6c has a heating output (thermal power) with a maximum power consumption of 1.6 kW.

  In this embodiment, the induction heating coils 6a and 6b on the front left and right sides of the top plate 2 have a diameter of about 200 mm so that a pot having a diameter of about 200 mm, which is often used for cooking pots, can be efficiently heated. The pan position display portions 4a and 4b provided on the top surface of the top plate 2 directly above the induction heating coils 6a and 6b are displayed with a size substantially the same as the diameter of the induction heating coils 6a and 6b.

  The induction heating coil 6c on the rear side of the center of the top plate 2 has a diameter of about 140 mm and is sized so that a small cooking pot can be efficiently heated. And the pan position display part 4c provided in the upper surface of the top plate 2 just above the induction heating coil 6c is displayed with a size substantially the same as the diameter of the induction heating coil 6c.

  The size of the induction heating cooker main body 1 is adjusted to the opening size of the mounting hole provided in the counter top of the system kitchen 10 in which the main body 1 is incorporated. The dimensions of the opening are 560 mm in width and 460 mm in depth in JIS.

The top plate 2 has a width of about 600 mm and a depth of about 400 mm according to the opening size of the mounting hole. In this range, the induction heating coil 6 a having a diameter of 200 mm,
6b was arranged at an interval of 100 mm on the front left and right sides, and an induction heating coil 6c having a diameter of 140 mm was arranged on the center rear side.

  The grill portion 5 is provided below the induction heating coil 6 on the left side or the right side (left side in this embodiment) in the main body 1. The grill part 5 is a rectangular box, and has an electric heater for heating an object to be heated. In this embodiment, the electric heater is a sheathed heater (not shown) having a heating output of 1.2 kW. Further, the grill portion 5 includes a door 5a provided with a handle 5b, and a tray (not shown) that can be taken in and out from the front surface of the main body 1 together with the door 5a. A net (not shown) on which the object to be heated is placed is placed on the saucer for cooking. The grill unit 5 performs cooking on the grill by placing a cooked object such as fish, pizza, or gratin on the net. When cooking in the grill unit 5, odors and smoke are generated in the grill unit 5. In order to prevent them from being exhausted indoors from the exhaust part 1b and polluting the indoor air, a mechanism for purifying exhaust from the grill part 5 with a catalyst may be provided. Since the catalyst requires heating, a 0.3 kW heater (not shown) is incorporated. Therefore, when cooking with the grill part 5 provided with the catalyst, the power consumption is 1.5 kW in total.

  The induction heating cooker with such a thermal power has the maximum total power within the predetermined rated value due to restrictions on the power supply situation (power capacity, wiring capacity, outlet type, etc.) of general households and legal restrictions. A range of products. In the case of this embodiment, the rated power of the device is 5.8 kW.

  On the upper surface of the pan position display parts 4a and 4b of the top plate 2, a display part 300 for displaying the priority order of the thermal power is provided. In the display unit 300, “1” indicates the first priority, and “2” indicates the second priority. The priority setting means for the thermal power is set by operating the setting key 402 after pressing a menu key 404 described later.

  FIG. 3 shows a case where the light of the light emitting elements 303a and 303b configured by the light emitting diodes LED is displayed through the light guide tube 322, which is displayed on the top plate 2 on the upper surface of the induction heating cooker, and which indicates the priority order of the thermal power. It is explanatory drawing. On the substrate 320, light emitting elements 303a and 303b are arranged. The light emitting elements 303a and 303b are each provided with a light guide tube mounting cover 321 so as to keep the distance between the light guide tube 322 fixed and the light emitting elements 303a and 303b. Since the light guide tube 322 allows the light from the light emitting elements 303a and 303b to pass therethrough, it is formed of a transparent resin. When the light of the light emitting elements 303a and 303b is applied to one end face of the light guide 322, the light passes through the light guide tube 322 and is guided to the other end to irradiate the display unit 300 with the priority of thermal power. . Since the light is totally reflected at the side surface, it can reach the tip efficiently.

  In this embodiment, each induction heating coil 6a, 6b is provided with a gap, and the light guide tube 322 displays the heating power priority of the top plate 2 from the gap between the coils of each induction heating coil 6a, 6b. Located on the display unit 300. The light guide tube 322 has a space without being in direct contact with the top plate 2. This is because the heat-resistant temperature of the resin through which light passes cannot be taken so high that it avoids contact with the top plate 2 where the temperature rises. In this embodiment, the light guide tube 322 is linear, but it may be curved, so that it can be arranged through a complicated gap between induction heating coils, and the LED is fixed in one place and adjusted by the light guide tube 322. The substrate 320 can be downsized.

  FIG. 4 is an explanatory diagram showing the panel operation unit 7 on the front surface of the main body 1 of the induction heating cooker. The panel operation unit 7 is provided on the right front surface of the main body 1, which is a side position of the grill unit 5. As shown in FIG. 4, the power supply is turned on / off switch 7a for turning on / off the induction heating cooker and the turn / start key 7b for turning on / off a sheathed heater which is a heating means of the grill section 5. The panel display unit 7c displays the contents operated by the panel operation unit 7 in an easy-to-understand manner for the user.

  FIG. 5 is an explanatory diagram showing the upper surface operation units 8a, 8b, and 8c of the induction heating cooker. The upper surface operation unit 8 is provided in the front frame portion of the top plate frame 3 provided in front of the top plate 2. In this embodiment, it is provided on the front frame portion of the top plate frame 3, but it may be provided on the top plate 2.

  The upper surface operation unit 8 includes upper surface operation units 8a, 8b, and 8c corresponding to the induction heating coils 6a, 6b, and 6c, respectively. As shown in FIG. 5, the upper surface operation units 8a and 8b have a cut / start key 401 that is pressed when energization of each induction heating coil 6a and 6b is turned on and off, and the heating power (output) of each induction heating coil 6a and 6b. ), Timer value, automatic cooking setting (selection), setting key 402 of priority order setting means for selecting an induction heating coil that automatically limits the heating power when the maximum total power of the device exceeds the rated value, respectively. Timer key 403 that is pressed when setting the timer time of the induction heating coils 6a and 6b, and menu key 404 that is pressed when setting the priority of the induction heating coils 6a and 6b and automatic cooking of the induction heating coils 6a and 6b. Is provided.

  Similarly, as shown in FIG. 5, the setting key 402 to be pressed when setting (selecting) the heating power (output), timer value, and automatic cooking of the induction heating coil 6c, and the timer time are set on the upper surface operation portion 8c. A timer key 403 to be pressed and a menu key 404 to be pressed when automatic cooking is set are provided.

  As shown in FIG. 6, the setting key 402 can set stepwise outputs for the induction heating coils 6a, 6b, and 6c. In FIG. 6, induction heating coils 6a and 6b have a maximum output of 3.0 kW. However, even if the same induction heating coils 6a and 6b are used, the maximum output varies depending on the material to be heated. When the maximum output varies between the cooking pot and the cooking pot made of a non-magnetic material, a stepwise output may be set according to each maximum output.

  Although not shown, when the timer key 403 is pressed, a timer control setting request is issued to the control unit 713 described later, and the set time can be set as a stepwise timer value.

  Further, when the menu key 404 is pressed, the automatic cooking setting process can be started. Then, by operating the setting key 402, the four types of automatic cooking functions shown in FIG. 7 are basically provided, and these are displayed and can be selected.

Priority order setting means for setting a priority order for selecting the induction heating coil that automatically reduces the heating power when the maximum total power of the device exceeds the rated value is, for example, the induction heating coil 6a,
Since the maximum heating power of 6b is 3.0 kW, if the priority of the induction heating coil 6a is set to the first priority, the induction heating coil 6a can use the maximum heating power of 3.0 kW, but the remaining induction heating coils 6b and 6c Since the rated power of 5.8 kW is, the other two induction heating coils 6b and 6c can be used only within a total range of 2.8 kW. At this time, when the induction heating coil 6c is used at 1.6 kW, the induction heating coil 6b operates at a maximum of 1.1 kW. In this way, the higher priority can be operated with the maximum thermal power, but the lower priority may limit or decrease the thermal power depending on conditions. That is, when the user has priority setting means capable of setting the priority for the two induction heating coils, and the control unit supplies power to the two induction heating coils, the total power is the device. It is possible to give priority to the output power of the induction heating coil having the higher priority set by the priority setting means so as to be within the rated power. For this reason, for example, right-handed and left-handed people can prioritize the firepower that is easy to cook.

  The automatic cooking function is stored in a control unit 713 which will be described later by controlling the temperature of the cooking pan, which is the object to be heated, and in this embodiment, it is heat retention, rice cooking, deep-fried food, and water boiling. In FIG. 7, the induction heating coil 6 c provided at the center rear side of the top plate 2 automatically keeps the heat and cooked rice in relation to the set maximum output (1.6 kW) and the maximum output required by automatic cooking. Cooking can be set, but the induction heating coil 6c can also be set to stew. In addition, the induction heating coils 6a and 6b provided on the front left and right of the top plate 2 having a maximum power consumption larger than that of the induction heating coil 6c have a maximum power consumption of 3.0 kW when heating iron and stainless steel, respectively. Since it is possible to output, any of the automatic cooking menus (heat retention, stew, rice cooking, fried food, kettle) listed in the present embodiment can be set for any automatic cooking because the set maximum output is low.

  For example, when the temperature of the automatic cooking menu is set, the induction heating coil 6 corresponding to the input setting key 402 is set to a maximum output of 0.5 kW during the automatic cooking menu.

  Similarly, when another automatic cooking menu is set, the maximum output is set to 1.1 kW for cooking rice, the maximum output to 1.8 kW for deep-fried food, and the maximum output to 2 kW for hot water.

  The induction heating coil 6 set with the automatic setting menu detects the temperature of the cooking pan by a temperature detector 711 described later, adjusts the output according to the temperature, and cooks according to the set automatic cooking control program ( Heat treatment).

  The automatic cooking of the stew in the induction heating coil 6c may be smaller than the maximum output required for automatic cooking of cooked rice. Stewed cooking requires an output that heats to the boiling temperature. However, once the object to be heated boils, the output for maintaining the boiling temperature is unnecessary thereafter. Although it is affected by the size and material of the pan, an output that is less than the output required to heat the food in the pan to the boiling temperature is sufficient.

  The relationship between automatic cooking and the induction heating coil 6 has been described so far. The induction heating coil 6c whose set maximum power consumption is smaller than those of the other induction heating coils 6a and 6b is provided in the back of the top plate 2. It is in a location close to the intake part 1a and the exhaust part 1b. For this reason, when trying to cook rice in a pan, the flying (foam) scatters from the lid, so there is a possibility that the flying may infiltrate into the main body particularly from the intake portion 1a.

  Further, if automatic cooking of rice is not performed, even if heat retention or stew is set by other automatic cooking performed by the induction heating coil 6c, only an electric power of less than 1.1 kW is constrained by the induction heating coil 6c. Since the electric power distributed to the heating coils 6a and 6b and the grill part 5 increases, the induction heating coil 6c may not set the rice cooking function by automatic cooking.

  As shown in FIG. 2, the upper surface display unit 9 is provided on the front side of the top plate 2 and at a position corresponding to the upper surface operation unit 8 of each induction heating coil. The set value of the output operated by the upper surface operation unit 8, the contents of the automatic cooking menu, the cooking timer time, and the like are displayed by the user near the upper surface operation unit 8 in an easy-to-understand manner.

Note that the upper surface operation units 8a, 8b, and 8c and the upper surface display units 9a, 9b, and 9c have the induction heating coils 6a, 6c,
6 b and 6 c were provided in a straight line on the side of the top plate 2 on the near side.

  FIG. 8 is a circuit block diagram of the induction heating cooker. In FIG. 8, an AC power source 701 that is a commercial power source input to the induction heating cooker supplies electric power (thermal power) to the sheathed heater 702 that is a heating means of the grill portion 5 and the induction heating coils 6a, 6b, and 6c and is controlled. To the inverter circuits 703, 704, and 705. The on / off circuit 706 supplies power by controlling on / off of the sheathed heater 702 that is a heating means of the grill portion 5.

The upper surface operation circuit unit 707 is connected to the upper surface operation unit 8 and converts the input information into a signal and transmits the signal to the control unit 713. The upper surface display circuit unit 708 displays the display signal from the control unit 713 on the upper surface display unit 9 and the display unit 300 that displays the priority order. The panel operation circuit unit 709 changes the input at the panel operation unit 7 into a signal to be sent to the control unit 713. The panel display circuit unit 710 displays the output of the control unit 713 on the panel display unit.

  The temperature detector 711 is provided below the top plate 2, and detects the temperature of the cooking pan heated by each induction heating coil 6 a, 6 b, 6 c via the top plate 2. At the time of automatic cooking using the set automatic cooking menu, the output of the induction heating coil is adjusted based on the temperature information detected by the temperature detector 711 to control the pan at a predetermined temperature. The notification unit 712 notifies the user with a buzzer sound or the like based on the output of the control unit 713.

The control unit 713 is a control unit configured with a microcomputer. The control unit 713 inputs operation signals from the upper surface operation circuit unit 707 and the panel operation circuit unit 709 and an output signal from the temperature detector 711, and outputs display signals to the upper surface display circuit unit 708 and the panel display circuit unit 710. Output. Control signals are output to an on / off circuit 706 for turning on / off the sheathed heater 702 that is a heating means of the grill section 5 and inverter circuits 703, 704, 705 for adjusting the outputs of the induction heating coils 6a, 6b, 6c in a plurality of stages. I have control.

  Next, details of the control of the induction heating coil 6 described above will be described. FIG. 10 is a diagram illustrating the inverter circuits 703, 704, and 705 of the induction heating coils 6a, 6b, and 6c shown in FIG. Since the three induction heating coils 6 are the same, only one will be described.

The inverter circuit 703 will be described. The alternating current supplied from the alternating current power source 117 is converted into direct current by the rectifying means 102 and connected to a switching unit constituted by a series body of the switching elements 103 and 105. Diodes 104 and 106 are connected in antiparallel to the switching elements 103 and 105, respectively, and a resonance circuit unit composed of the induction heating coil 6a and the resonance capacitor 107 is connected between the connection point of the switching elements 103 and 105 and the reference point of the DC voltage. Connected. Snubber capacitors 108 and 109 are connected to the switching elements 103 and 105, respectively.

  By switching on and off the switching elements 103 and 105 exclusively at a high frequency, a high-frequency resonance current is supplied to the resonance circuit section composed of the induction heating coil 6a and the resonance capacitor 107, and a load disposed in the vicinity of the induction heating coil 6a is heated. To do.

  The inverter control unit 110 inputs a target power level instruction to be applied to the load from the control unit 713 (FIG. 8), and controls the switching elements 103 and 105 so that the output power of the inverter circuit 703 becomes a target value.

  The input current conversion unit 112 converts the output signal of the detection unit 111 that detects the current input from the AC power source 117 into an appropriate level and outputs the converted signal to the inverter control unit 110.

  The input voltage detection means 113 detects the voltage of the AC power supply 117, converts it to an appropriate level, and outputs it to the control means 110.

  The inverter current detection means 115 converts the output signal of the detection means 114 for detecting the current flowing through the resonance circuit section to an appropriate level and outputs it to the inverter control section 110.

  Inverter control unit 110 receives these signals, calculates inverter power that is input to the load, determines the state of the load, suitability for heating, etc., and exclusively controls on / off of switching elements 103 and 105. The signal is converted to an appropriate drive level for the switching elements 103 and 105 by the level converter 116, and the switching elements 103 and 105 are driven. Further, the inverter control unit 110 outputs these states to the control unit 713.

  By specifying the heating power of the plurality of induction heating coils 6 and the priority order of the two induction heating coils 6a and 6b disposed near the front surface of the main body 1, the induction heating coil 6 that can be used by the user with the maximum heating power is provided. Since it can be specified with certainty, there is no variation in thermal power due to automatic thermal power adjustment performed by the control unit 713, and stable cooking can be performed.

  Next, the operation according to the above configuration will be described. First, in order to set the priority order of the two induction heating coils 6a and 6b arranged near the front surface, the menu key 404 of the upper surface operation units 8a and 8b is pressed. Next, by operating the setting key 402, it is set which of the induction heating coil 6a or the induction heating coil 6b has priority. At this time, a number indicating the priority order is emitted and displayed on the upper surface of the pan position display parts 4a and 4b of the top plate 2 on the display part 300 for displaying the priority order of the thermal power. The priorities are set in advance, and may be changed as necessary.

  Next, for example, a case where the user cooks with the induction heating coil 6a on the left side before the top plate 2 will be described.

  First, when the metal pan containing the object to be cooked is placed at the center of the pan position display portion 4a on the induction heating coil 6a and the power off / on switch 7a of the panel operation unit 7 is turned on, induction cooking is performed. Operation of the vessel begins.

  Next, the stepwise heating power (output) shown in FIG. 6 is increased or decreased in accordance with the numerical value and / or the required heating power in accordance with the output request by the setting key 402 for setting the output of the induction heating coil 6a of the upper surface operation unit 8a. They are displayed in order on the upper surface display portion 9a by a scale or the like.

  The requested thermal power displayed by the user's operation is set by the control unit 713 as a set output that is confirmed when left for several seconds in the display state.

  Next, when the control unit 713 detects an input of heating start from the cut / start key 401 of the upper surface operation unit 8a, power is supplied from the control unit 713 to the inverter circuit 703 so that a set output is obtained. To start.

  The inverter control unit 110 detects whether the metal pan is a heatable pan and the material is magnetic or non-magnetic based on the detection results of the input current conversion unit 112 and the inverter current detection unit 115. If the inverter control unit 110 determines that it is inappropriate for heating, the inverter control unit 110 instructs the inverter circuit 703 to stop heating. If the inverter control unit 110 determines that the heating is appropriate, the inverter capacitor 110 is switched according to the material of the metal pan so that heating is performed at a resonance frequency according to the material (a detailed circuit is not shown). ), The switching elements 103 and 105 are driven.

  When the user's manual cooking is completed, a cut input is made from the cut / start key 401 of the upper surface operation unit 8a, and when the control unit 713 receives this heat cut request, the heating of the induction heating coil 6a is stopped. After the use of the induction heating coil 6a, if there is no other operation, the power is turned off by the power-off operation of the power-off / on switch 7a of the panel operation unit 7.

  In the case of setting the cooking timer, the control unit 713 enters a timer setting input waiting state by the input of the timer key 403 of the upper surface operation unit 8 corresponding to the corresponding induction heating coil 6 during cooking.

  When entering the timer setting input waiting state, the corresponding upper surface display unit 9 is switched to the timer value input screen. When a timer value is input by the setting key 402, the timer value according to the input is displayed on the upper surface display unit 9 in order.

If the display contents remain unchanged, in other words, if a new timer value is not input from the setting key 402, the passage of several seconds is monitored. After elapse of a predetermined time, the control unit 713 sounds a buzzer from the notification unit 712, and when there is no new timer value input, the control unit 713 sets the final input timer value as a determined value. And the control part 713 starts the timer for the set time. The control unit 713 controls the inverter circuits 703, 704 to stop energization of the corresponding induction heating coil 6 when the set time is counted by the cooking timer and when the set time ends.
A command is issued to 705, the heating of the induction heating coil 6 is stopped, and the notification unit 712 notifies the end of the set time by sounding a buzzer.

  When grilling fish or the like on the grill unit 5, the user puts an object to be heated on the net, stores the net in the grill unit 5, and then turns on the power off / on switch 7 a of the panel operation unit 7. By the power-on operation of the power-off / on switch 7a, the grill portion 5 is also in a heating preparation state together with other heating means.

Next, when the off / start key 7b of the panel operation unit 7 is pressed, it is determined that there is a heating request to the grill unit 5, and the control unit 713 energizes the sheath heater 702 of the grill unit 5 to the on / off circuit 706. Then, heating of the object to be heated placed on the net is started. Although not shown, a temperature detector 711 is provided in the heating chamber of the grill unit 5, and the detection result of the temperature sensor is received by the control unit 713, and the heating state of the object to be heated is determined to determine the heating state in the heating chamber. The grill part 5 is cooked while adjusting the temperature.

  The temperature adjustment process varies depending on the object to be heated in the heating chamber. Although not shown in FIG. 2, for example, in the case of grilled fish, the amount of heating is changed according to the progress of the grilled fish that is to be heated. When it is detected that the temperature change in the chamber has decreased, the control unit 713 stops energizing the sheathed heater 702. When cooking is finished, the user turns off the power by pressing the power off / on switch 7a when there is no other cooking. As described above, the grill unit 5 has a range of required outputs depending on the cooking target. Therefore, it is necessary to secure the set maximum output in advance. In the present embodiment, as described below, the set maximum output of the grill portion 5 is set to 1.5 kW.

Next, automatic cooking by the induction heating coil 6 will be described. For example, when cooking fried food with the induction heating coil 6b, a tempura pan filled with oil is placed at the center of the pan position display portion 4b on the induction heating coil 6b, and the user turns off / on the switch 7a of the panel operation unit 7a. Is turned on, the induction heating coil 6b is ready for heating.

  Next, the automatic cooking mode is set by inputting the menu key 404 of the upper surface operation unit 8b, and the control unit 713 sequentially displays the automatic cooking menu on the display unit 9b by inputting the setting key 402 of the upper surface operation unit 8b.

  If the fried food display state of the automatic cooking menu is maintained for several seconds, in other words, if the fried food cooking is maintained for a predetermined time with the operation of the setting key 402, the control unit 713 sets the automatic cooking menu. To do.

  Next, when a set start request for fried food cooking is input to the control unit 713 by pressing the cut / start key 401 of the upper surface operation unit 8b, the control unit 713 matches the preheat temperature set separately. Thus, the inverter circuit 704 of the induction heating coil 6b is requested to be preheated, and power is supplied from the inverter circuit 704, and the induction heating coil 6b starts preheating.

  When the control unit 713 determines that the oil temperature has reached the set temperature based on the temperature information from the temperature detector 711, the control unit 713 issues a notification request to the notification unit 712, and uses a buzzer that indicates that preheating has ended. Inform the person.

  During fried food cooking, the controller 713 instructs the inverter circuit 704 to maintain a predetermined oil temperature based on temperature information from the temperature detector 711 as cooking progresses, and the power to the induction heating coil 6b is supplied. Adjust.

  When the fried food cooking is finished, the cut / start key 401 of the upper surface operation unit 8b is pressed by the user's operation, and the control unit 713 stops heating by this input. If cooking is not being performed, the user presses the power off / on switch 7a of the panel operation unit 7 to turn off the power.

  Next, control for preventing the power consumption of the entire induction heating cooker from exceeding a predetermined rated power will be described with reference to FIG. FIG. 9 is a diagram illustrating an example of output setting of each heating unit. In FIG. 9, the sheathed heater is an electric heater that is a heating means of the grill portion 5.

  Example 1 in FIG. 9 is a case where cooking is started with the induction heating coil 6c set to the maximum output of 1.6 kW that can be set by the setting key 402 of the upper surface operation unit 8c.

  First, with respect to the two induction heating coils 6a and 6b arranged near the front surface, the priority is set such that the induction heating coil 6a is first and the induction heating coil 6b is second.

When the induction heating coil 6a is set to the maximum output of 3.0 kW that can be set by the setting key 402 of the upper surface operation unit 8a after the heating by the induction heating coil 6c is started, the induction heating coil 6c is induced to be 1.6 kW. The total output with the required output of 3.0 kW of the heating coil 6a is 4.6 kW. This is within 5.8 kW of the rated power of the device in this example. Therefore, the control unit 713 accepts the output request of the induction heating coil 6a. And the control part 713 displays the display corresponding to 3.0 kW on the upper surface display part 9a, requests | requires the electric power supply to the induction heating coil 6a from the inverter circuit 703, and a user starts cooking.

  Next, in order to cook with the induction heating coil 6b and to set the output setting to exceed 1.1 kW, the control unit 713 controls the power consumption of the entire device so that it does not exceed the rated power of 5.8 kW. The operation of the setting key 402 for setting the output of the induction heating coil 6b does not accept an output request exceeding 1.1 kW, and does not display an output greater than 1.1 kW on the upper surface display portion 9b. Since each induction heating coil 6 has discretely settable thermal powers, in this case, 1.2 kW is not set for the rated power of 5.8 kW.

  Therefore, the output of the induction heating coil 6b having the second highest priority can be set only to 1.1 kW. Here, if the induction heating coil 6b is set to the first priority and the induction heating coil 6a is set to the second priority, if the output setting of the induction heating coil 6b is set to exceed 1.1 kW, In order to prevent the power consumption from exceeding the rated power of 5.8 kW, the controller 713 controls the heating power of the induction heating coil 6a to decrease.

  Thus, when the set output is not larger than the value obtained by subtracting the total output currently being cooked from the predetermined rated power of 5.8 kW, the set output is accepted and the user does not exceed 1.1 kW. Guide to set.

  And when it is going to cook simultaneously with the three induction heating coils 6a, 6b, 6c on the top plate 2, it is possible to cook with the maximum output which can be set with the induction heating coil 6a, and the remaining induction heating coils. In 6b and 6c, cooking can be performed with adjusted output.

  Therefore, in the case of the present embodiment, when three induction heating coils 6a, 6b, 6c are used simultaneously, cooking can be performed with the maximum output that can be set by one induction heating coil, and the remaining two induction heating coils. However, because cooking is possible with adjusted output, it is possible to cook comfortably without feeling inconvenience due to the difficulty of use due to the limitation of output during cooking, and it is very convenient to use.

In Example 2 of FIG. 9, the heating power of the induction heating coil 6a and the induction heating coil 6b is 3.0 kW and 2.5.
When cooking is started at the grill unit 5 after setting to kW and cooking is started, the total output of 3 kW of the induction heating coil 6a, 2.5 kW of the induction heating coil 6b and the required output of the grill unit 5 of 1.5 kW Is 7.0 kW, which is 5.8 kW or more, which is the rated power in this embodiment. Therefore, the control unit 713 controls the output of the induction heating coil 6b having a low priority to be reduced from 2.5 kW to 1.1 kW, so that the total output is 3 kW of the induction heating coil 6a and 1 of the induction heating coil 6b. The total power of .5 kW, which is 0.1 kW and the required output of the grill section 5, is 5.6 kW, and the rated power can be within 5.8 kW.

  In this case, since the set maximum output is preset for the grill part 5 regardless of what is to be cooked, it is necessary to ensure a constant output unlike the other induction heating coils 6. is there. In Example 2, since the required output required for heating the grill unit 5 was satisfied with respect to the maximum power, the control unit 713 was able to accept the output request of the grill unit 5.

  Thus, since the three induction heating coils 6 on the top plate 2 and the grill portion 5 can be cooked simultaneously, the usability is very good.

  In addition, when there is a possibility that the total output exceeds the rated output, the induction heating coils 6 that automatically reduce the output are the induction heating coils 6a and 6b on the right and left sides of the top plate 2 that are set in advance in the priority order. Since it is specified as either one, the user can perform cooking without any problem in the finishing of cooking even if the output changes in the middle with the induction heating coil 6 having the lower priority in advance, so that the usability is improved. very good.

  In addition, by designating the thermal power and the priority order, the user can surely designate the induction heating coil with the maximum thermal power, so that there is no variation in the thermal power due to the thermal power adjustment, and stable cooking can be performed. For this reason, even if it changes to a thermal power smaller than this, since it can be used independently without interfering with others, it is convenient. Moreover, since the positional relationship of the induction heating coil with respect to the dominant arm can be clarified, the usability is improved.

In Example 3 of FIG. 9, when the heating power of the induction heating coil 6a is set to 3.0 kW and the heating power of the induction heating coil 6c is set to 1.6 kW, and the required output of the grill section 5 is 1.5 kW, the total output becomes 6 Since the rated power is 5.8 kW or more, since the induction heating coil 6b with the second highest priority is not operated, the output of the induction heating coil 6a is controlled to be reduced from 3.0 kW to 2.5 kW. By doing so, the total output can be within the rated power of 5.8 kW.

  Thus, since the use of the grill part 5 is not limited, cooking can be performed comfortably and the usability is very good.

  In addition, by designating the thermal power and the priority order, the user can surely designate the induction heating coil with the maximum thermal power, so that there is no variation in the thermal power due to the thermal power adjustment, and stable cooking can be performed. For this reason, even if it changes to a thermal power smaller than this, since it can be used independently without interfering with others, it is convenient.

  In addition, it is possible to further improve usability by assigning a higher priority to one of the two induction heating coils 6a and 6b for setting the priority, which is easy to cook with the dominant arm.

  In Example 4 of FIG. 9, the heating power of the induction heating coil 6a is 2.0 kW, the heating power of the induction heating coil 6b is 1.4 kW, the heating power of the induction heating coil 6c is 0.8 kW, and the output of the grill unit 5 is 1.5 kW. The total output at this time is 5.7 kW, which is within the rated power of 5.8 kW.

  As described above, when the user uses the heating unit according to cooking, the three induction heating coils 6 on the top plate 2 and the grill that can cook grilled fish, pizza, gratin and the like that many Japanese prefer. Since it can cook using the part 5 simultaneously, it is not necessary to divide cooking into several times.

  In addition, if there is a heating unit that cannot be used even though it has a plurality of heating units, the user is significantly inconvenienced at the time of cooking and suffers, but this can be eliminated.

  Example 5 in FIG. 9 shows that while the three induction heating coils 6 on the top plate 2 as in Example 4 and the grill portion 5 are cooking at the same time, high output is produced in the cooking of the induction heating coil 6a. If the heating power setting is reset to 3.0 kW which is the maximum output of the induction heating coil 6a, the setting heating power of the induction heating coil 6b is reduced from 1.4 kW to 0.4 kW, and the total output at this time is 5 It becomes 0.7 kW, and the rated power is within 5.8 kW.

  Thus, even if cooking is simultaneously performed by the three induction heating coils 6 on the top plate 2 and the grill portion 5, when high heating power is required, cooking can be performed with maximum heating power. Therefore, it is possible to suppress a decrease in cooking performance, and the usability is very good.

  In addition, by automatically reducing the output of the induction heating coil 6b to 0.4 kW, the three induction heating coils 6 on the top plate 2 and the grill portion 5 can be cooked simultaneously. If there is a heating part that cannot be used even though it has a heating part, it is possible to eliminate the inconvenience caused to the user during cooking and the pain.

  In addition, when there is a possibility that the total output exceeds the rated output, the induction heating coils 6 that automatically reduce the output are the induction heating coils 6a and 6b on the right and left sides of the top plate 2 that are set in advance in the priority order. Since it is specified as either one, the user can perform cooking without any problem in the finishing of cooking even if the output changes in the middle with the induction heating coil 6 having the lower priority in advance, so that the usability is improved. very good.

  In addition, by specifying the setting and priority order of the thermal power, the user can reliably specify the induction heating coil that can be used with the maximum thermal power, so induction heating with no thermal power variation due to automatic thermal power adjustment performed by the control unit 713 Stable cooking can be performed with a coil.

  In addition, it is possible to further improve usability by assigning a higher priority to one of the two induction heating coils 6a and 6b for setting the priority, which is easy to cook with the dominant arm.

It is an external appearance 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 when the light of LED displayed on the plate of the upper surface of an induction heating cooking appliance displays the priority of a thermal power through a light guide tube. It is explanatory drawing which shows the panel operation part in the main body front of an induction heating cooking appliance. It is explanatory drawing which shows the upper surface operation part of an induction heating cooking appliance. It is a figure explaining the heat power which can be set of an induction heating cooking appliance. It is a figure explaining the automatic cooking which can be set of an induction heating cooking appliance. It is a block diagram explaining the heating part of an induction heating cooking appliance, and its control. It is explanatory drawing for making the sum total of the power consumption at the time of cooking of an induction heating cooking appliance fall below to the maximum power consumption. It is a figure explaining the inverter circuit of FIG.

Explanation of symbols

2 Top plate 5 Grill part 6 Induction heating coil 300 Display part 303a, 303b Light emitting element 322 Light guide tube 703, 704, 705 Inverter circuit 713 Control part

Claims (4)

Two induction heating coils disposed near the front surface of the main body, one induction heating coil disposed near the induction heating coil, an inverter circuit for driving these induction heating coils, and the induction heating coil A top plate that covers the upper surface and on which the cooking pan is placed, an electric heater that heats the grill disposed in the main body, and a controller that controls the power supply to the electric heater or the output power of the inverter circuit In induction overheating cookers,
When the user has priority setting means capable of setting priority for the two induction heating coils, and the control unit supplies power to the two induction heating coils, the total power is An induction heating cooker characterized in that priority is given to the output power of the higher priority induction heating coil set by the priority setting means so as to be within the rated power of the device.   In the induction heating cooker according to claim 1, when electric power is supplied to the two induction heating coils, the one induction heating coil arranged at the back, and the electric heater for heating the grill portion. The induction heating cooker according to claim 1, wherein the controller can supply maximum power to the induction heating coil having a higher priority among the two induction heating coils.   The induction heating cooker according to any one of claims 1 to 2, wherein a display unit for displaying the priority set by the priority setting means is provided on the top plate.   The induction heating cooker according to claim 3, wherein the display unit includes a light guide tube formed by molding a transparent resin, and a light emitting element on one side of the light guide tube, and the light guide element emits the light by the light emission of the light emitting element. An induction heating cooker characterized in that light is guided to the other side of the tube to display the priority order.

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