JP2008140673A - Induction heating cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooking device composed of a plurality of heating coils having different coil diameters causing no deterioration in cooking performance when cooking with each heating power setting set in an operation display portion. <P>SOLUTION: The induction heating cooking device includes first and second heating coils having different coil diameters; and first and second control portions which control high-harmonic output currents supplied to the coils so that the first coil and the second coil provide different output power with the same heating power setting to prevent the deterioration of cooking performance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an induction heating cooker having a plurality of heating units used in general homes, restaurants and offices.

Conventionally, as shown in FIG. 2, this type of cooking device includes a top plate 101 on which a pan or the like is placed, a heater 102 that heats the pan or the like by an electromagnetic induction winding (not shown) provided inside the case body, An operation means 103 for operating the device is provided. The operation means 103 is provided with an input switch 104, a heating stage controller 105 for adjusting the heating power, a notification means 106 for notifying acceptance by the operation means 103, and a display means 107 for displaying the set heating power of the heater 102. Further, the heater 102 is composed of two ports, a left heater 102a and a right heater 102b, and the set heating power of each heater can be changed in a plurality of stages. For example, the maximum heating power setting is 2000W, the following 1500W, 1000W, 500W, The set thermal power can be changed in the order of 250W.
Japanese Patent Laid-Open No. 2003-347022

  However, in the conventional configuration, when the diameter of the electromagnetic induction winding (heating coil) (not shown) constituting the heater 102 is the same in the left heater 102a and the right heater 102b, the left heater 102a and the right heater 102b Are operated at the same set heating power, the watt (output power) per unit area of the electromagnetic induction winding is the same, but the diameter of the electromagnetic induction winding (heating coil) of the right heater 102b is larger than that of the left heater 102a. If it is large, even if the left heater 102a and the right heater 102b are operated with the same set heating power, the watt (output power) per unit area of the electromagnetic induction winding is larger in the right heater 102b than in the left heater 102a. turn into. For this reason, in a cooking device having a configuration in which the diameter of the electromagnetic induction winding (heating coil) is different, when cooking is performed with the same set thermal power, the smaller the diameter of the electromagnetic induction winding (heating coil) Since the watt per unit area (output power) will be larger than the larger one, even if cooking is done in the same way as the larger diameter with the smaller diameter, There is a risk of scorching. On the contrary, even if cooking is performed in the same way as the smaller diameter, the food may not be cooked well or may not be cooked.

  As described above, the watt (output power) per unit area is different even if cooking is performed for the same time with the same set heating power depending on the diameter of the electromagnetic induction winding (heating coil). Since it becomes necessary to change, there is a problem that it is bothersome and may cause a cooking mistake.

  The present invention solves the above-described conventional problems, and even in an induction heating cooker having a small electromagnetic induction winding (heating coil), the cooked food is prevented from being burnt, and is more convenient for the user. The purpose is to provide.

  In order to solve the above-described conventional problems, a heating cooker according to the present invention includes first and second heating coils having different coil diameters, and a first high-frequency current supplied to each of the first and second heating coils. And the second control unit and the operation display unit for setting each operation of the first and second control units independently and displaying the setting contents, the operation display unit, The output power of the first and second heating coils can be set in a plurality of stages, and the output power of the heating coil in the same heating power setting is different between the first and second heating coils. .

  By changing the output power of the heating coil with a small coil diameter at the same heating power setting to the output power of the heating coil with a large coil diameter, the output power per unit area of the heating coil is the same regardless of the coil diameter. Can be.

  The heating cooker of the present invention makes it possible to prevent overcooking and scorching of the cooked food by making the output power per unit area of the heating coil the same regardless of the diameter of the coil, and heating that is more convenient for the user. Can provide cooker.

  The first invention includes first and second heating coils having different coil diameters, first and second control units for supplying a high-frequency current to the first and second heating coils, respectively, and first and second In addition to setting each operation of the control unit independently, an operation display unit for displaying the setting contents is provided, and the operation display unit sets the output power of the first and second heating coils in a plurality of stages. In addition, the output power of the heating coil in the same heating power setting is different between the first and second heating coils. Thereby, in the induction cooking device comprised of a plurality of heating coils having different coil diameters, even if the heating power setting selected in the operation display unit is the same, by changing the high-frequency current supplied in each heating coil The output current per unit area in each heating coil can be adjusted together, and overcooking of cooking and scorching can be suppressed.

  The second invention is the second invention, in particular, in the first invention, the set heating power set in a plurality of stages in the operation heating section, and the second heating power is less than the set heating power and is less than the output power of the first heating coil. The output power of the heating coil is set to be small. Thereby, in the induction heating cooker comprised from the several heating coil from which a coil diameter differs, even when the thermal power setting selected in an operation display part is the same, especially at the time of the low thermal power used in order to heat a foodstuff In, the burn of cooked food can be suppressed.

  According to a third aspect of the invention, particularly in the first or second aspect of the invention, the first and second control units determine whether or not to supply a high-frequency current to the first and second heating coils, below a certain heating power setting. When the duty control is performed with a constant period, the high-frequency current supply time to the second heating coil is shorter than the high-frequency current supply time to the first heating coil. Thereby, in the induction heating cooker comprised from the several heating coil from which a coil diameter differs, even when the thermal power setting selected in an operation display part is the same, especially at the time of the low thermal power used in order to heat a foodstuff In, the burn of cooked food can be suppressed.

  According to a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the operation display section for setting the operation of the second control section has a display means for displaying that the output power is set to be small. When the set heating power in which the output power of the second heating coil is set to be smaller than the output power of the first heating coil is selected, display is performed by the display means. Thereby, even if it is the same heating power setting with the 1st heating coil 1 and the 2nd heating coil 2, it can tell to a user that the harmonic output current supplied to a coil is changed.

  According to a fifth invention, in any one of the first to fourth inventions, in particular, the operation display unit is provided with a notification means, and the output power of the second heating coil is set smaller than the output power of the first heating coil. When the set thermal power is selected, the notification means notifies the user. Thereby, even if it is the same heating power setting with the 1st heating coil 1 and the 2nd heating coil 2, it can tell to a user that the harmonic output current supplied to a coil is changed.

  Embodiments of an induction heating cooker according to the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a block diagram of an induction heating cooker in an embodiment of the present invention.

  In the induction heating cooker of FIG. 1, a high frequency current is passed through the first heating coil 1, the second heating coil 2, and the first heating coil for induction heating of an object to be heated such as a pan. A first control unit 3 that controls the high frequency current, a second heating unit 4 that controls the high frequency current to flow through the second heating coil, and the operation display unit 5 includes the first control unit 3. The operation setting state of the second control unit 4 is set, and the display corresponding to the setting state is independently displayed.

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

  First, when the user operates a switch or the like of the operation unit display unit 5, the operation unit display 5 outputs an operation start or set thermal power signal to the first control unit 3 or the second control unit 4. In response to this, the first control unit 3 or the second control unit 4 starts a heating operation, passes a high-frequency current through the first heating coil 1 or the second heating coil 2, or is in a heating operation. For this, the setting of the thermal power is changed, and the operation such as changing the amount of the high-frequency current flowing through the first heating coil 1 or the second heating coil 2 is performed. At the same time, the operation display unit 3 displays the set state of each heating unit. At this time, since the operation display unit 3 has an operation display element composed of LEDs independently corresponding to each heating unit, the user operates which heating unit in what setting state. Can be easily recognized.

  For example, when a high frequency current is passed through the first heating coil 1 and an object to be heated such as a pan is induction-heated, the “OFF / ON” key 6a, “heating power up” in the first operation area 6 shown in FIG. ”Key 6 b and“ thermal power down ”key 6 c, heating start and stop can be set each time the“ off / on ”key 6 a is pressed. If the“ thermal power up ”key 6 b or“ thermal power down ”key 6 c is pressed during heating, The first control unit 3 changes the heating thermal power, that is, the output (output current) of the high-frequency current flowing through the first heating coil 1. At the same time, the set state is displayed by turning on / off the LED 8a indicating the heating state in the first display area 8 and the LED 8b indicating the heating power setting state. If heating is in progress, the LED 8a indicating the heating state is turned on, and if heating is stopped, the LED 8a is turned off. Further, in the thermal power setting state, the LED corresponding to the thermal power set in the LED 8b, that is, thermal power such as “strong”, “medium”, and “weak” in the present embodiment is turned on.

  Similarly, when a high-frequency current is passed through the second heating coil 2 to inductively heat an object to be heated such as a pan, the second operation region shown in FIG. 1 is displayed in the second operation region 7 shown in FIG. The heating start and stop can be set each time the “OFF / ON” key 6a is pressed by the “OFF / ON” key 7a, the “thermal power up” key 7b, and the “thermal power down” key 7c. Alternatively, if the “thermal power down” key 7 c is pressed, the second operation unit 4 changes the heating thermal power, that is, the output (output current) of the high-frequency current that flows through the second heating coil 2. At the same time, the set state is displayed by turning on / off the LED 9a indicating the heating state in the second display area 9 and the LED 9b indicating the heating power setting state. If heating is in progress, the LED 9a indicating the heating state is turned on, and if heating is stopped, the LED 9a is turned off. Further, in the thermal power setting state, the LED corresponding to the thermal power set in the LED 9b, that is, “strong”, “medium”, “weak” in the present embodiment is turned on.

  In the above configuration, when the diameter of the first heating coil 1 and the diameter of the second heating coil are different, for example, when the diameter of the first heating coil is 18 cm and the diameter of the second heating coil is 12 cm, the operation display The amount of high-frequency current that the first control unit 1 supplies to the first heating coil 1 corresponding to the thermal power set in the unit 5, in this embodiment, “strong”, “medium”, and “weak” And the second control unit 2 controls the high-frequency current supplied to the second heating coil 2. At this time, in the first heating coil 1 having a large coil diameter of 18 cm, when the heating power set in the operation display unit 5 is “strong”, the first control unit supplies the first heating coil. The high frequency current is controlled so that the amount of power to be generated is 2000 W. Similarly, the high-frequency current to be supplied is controlled so that when the set thermal power is “medium”, the power amount is 1000 W, and when it is “weak”, the power amount is 500 W. On the other hand, in the second heating coil 2 having a small coil diameter of 12 cm, when the heating power set in the operation display unit 5 is “strong”, the second control unit 4 performs the second heating The high-frequency current is controlled so that the amount of power supplied to the coil is 1800W. Similarly, the high frequency current to be supplied is controlled so that when the set thermal power is “medium”, the electric energy is 900 W, and when “low”, the electric energy is 450 W.

  Also, the amount of power supplied to the first heating coil 1 and the second heating coil 2 is changed only when the heating power set in the operation display unit 5 is “weak”. That is, in the first heating coil 1 having a large coil diameter of 18 cm, the first control unit supplies the first heating coil 1 when the heating power set in the operation display unit 5 is “strong”. The high frequency current is controlled so that the amount of power to be generated is 2000 W. Similarly, the high-frequency current to be supplied is controlled so that when the set thermal power is “medium”, the power amount is 1000 W, and when it is “weak”, the power amount is 500 W. Similarly, in the second heating coil 2 having a small coil diameter of 12 cm, when the heating power set in the operation display unit 5 is “strong”, the second control unit 4 controls the first heating coil 1. In the case of “medium”, the high-frequency current is controlled so as to be 1000 W so that the amount of power supplied to the power is 2000 W. However, when the heating power set in the operation display unit 5 is “weak”, the second control unit 4 controls the high-frequency current so that the electric energy becomes 450 W.

  Furthermore, when the heating power set in the operation display unit 5 is “weak”, duty control is performed to repeat the operation of supplying power to the heating coil for a certain period of time and cutting off the supply of power for a certain period of time. The ratio of the time for supplying power to the heating coil and the time for not supplying power is changed between the first heating coil 1 and the second heating coil 2. That is, in the first heating coil 1 having a large coil diameter of 18 cm, when the heating power set in the operation display unit 5 is “strong”, the first control unit 3 applies the first heating coil 1 to the first heating coil 1. The high-frequency current is controlled so that the amount of power to be supplied is 2000 W, and in the case of “medium”, it is controlled to be 1000 W. When the heating power setting is “weak”, the first controller 3 supplies the first heating coil 1 with harmonic power of 1000 W for 7 seconds and does not supply high-frequency current for 3 seconds (7 seconds during 10 seconds). Duty control that repeats the operation of supplying a high-frequency current for a second is performed. Similarly, also in the second heating coil 2 having a small coil diameter of 12 cm, the second control unit 4 controls the second heating coil 2 when the heating power set in the operation display unit 5 is “strong”. The high-frequency current is controlled so that the amount of power supplied to the power is 2000 W, and when it is “medium”, the power is controlled to be 1000 W. However, when the heating power is set to “weak” at 5 on the operation display unit, the second operation unit 4 supplies harmonic power of 1000 W to the second heating coil 2 for 5 seconds, for 5 seconds. Duty control is repeated to repeat the operation of not supplying harmonic current (supplying harmonic current for 5 seconds for 10 seconds). As a result, even in an induction heating cooker including two heating coils having different diameters, it is possible to prevent overcooking and scorching of the cooked food, particularly in the case of low power heating power setting used for heat insulation cooking or the like. .

  Moreover, even if the notification means 10 arrange | positioned in the operation display part 5 is the setting with the same setting heat power of a 1st heating coil and a 2nd heating coil in the operation display part 5, it supplies the high frequency electric power If they are different, a buzzer sounds. Furthermore, the display means 11 arranged in the operation display unit 5 displays that the high frequency power supplied is different. Thereby, the user can grasp visually or audibly that the high frequency electric power currently supplied to the 1st heating coil and the 2nd heating coil differs.

  As described above, according to the present embodiment, in the induction heating cooker including the first heating coil 1 and the second heating coil 2 having different diameters, the first heating coil 1 and the first heating coil are displayed on the operation display unit 5. Even when the two heating coils 2 are set to the same heating power, the harmonic output currents supplied to the respective heating coils are different. In this way, the harmonic output current supplied per unit area is matched between the first heating coil 1 and the heating coil 2 of the younger brother 2 without increasing the number of set thermal powers in the operation display unit 5. Especially, at the time of low heating power used for heat insulation of the cooked product, it is possible to prevent the cooked product from being burnt on the pan without impairing the user-friendliness.

  Although the present embodiment describes the case where there are two heating coils and two control units, for example, even when there are three or more, for example, a heating coil with two large diameters and a heating coil with one small diameter Since the harmonic output power supplied per unit area can be adjusted by reducing the harmonic output power supplied to the heating coil having a small diameter compared to the two heating coils having a large diameter. The same effect is obtained.

  The heating cooker of the present invention is an induction heating cooker constructed by a system using a microcomputer or the like and having a plurality of heating coils having different diameters, and increases the number of set thermal powers that can be set on the operation display unit. Therefore, the present invention can be applied to an induction heating cooker having a plurality of heating coils.

Schematic diagram and block diagram of induction heating cooker in Embodiment 1 of the present invention Schematic of induction heating cooker in the conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st heating coil 2 2nd heating coil 3 1st control part 4 2nd control part

Claims (6)

First and second heating coils having different coil diameters, first and second control units for supplying a high-frequency current to the first and second heating coils, respectively, and the first and second control units. Each operation is set independently, and an operation display unit that displays the setting contents is included, and the operation display unit can set the output power of the first and second heating coils in a plurality of stages. An induction heating cooker configured such that the output power of the heating coil in the same heating power setting is different between the first and second heating coils. Even when the first heating coil and the second heating coil having a coil diameter smaller than that of the first heating coil are set and the same heating power setting is set in the operation heating unit, the first heating coil The induction heating cooker according to claim 1, wherein the output power of the second heating coil is set to be smaller than the output power. The configuration in which the output power of the second heating coil is set to be smaller than the output power of the first heating coil below a certain setting thermal power among the set thermal powers set in a plurality of stages in the operation heating unit. The induction heating cooker according to 1 or 2. Below a certain heating power setting, when the 1st and 2nd control part is performing the presence or absence of supply of the high frequency current to the 1st and 2nd heating coil by the duty control of a fixed period, 1st heating The induction heating cooker according to any one of claims 1 to 3, wherein the high-frequency current supply time to the second heating coil is shorter than the high-frequency current supply time to the coil. The operation display unit for setting the operation of the second control unit has display means for displaying that the output power is set to be small, and the output power of the second heating coil is higher than the output power of the first heating coil. The induction heating cooker according to any one of claims 1 to 4, wherein a display is performed by the display means when a set heating power that is set to be smaller is selected. An operation display unit is provided with a notification means, and when a set heating power in which the output power of the second heating coil is set to be smaller than the output power of the first heating coil is selected, a notification is made by the previous period notification means. The induction heating cooker according to any one of claims 1 to 5.

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